Set-OwaVirtualDirectory

The Identity parameter specifies the Outlook on the web virtual directory that you want to modify.

You can use any value that uniquely identifies the virtual directory. For example:

• Name or <Server>\Name

• Distinguished name (DN)

• GUID

The Name value uses the syntax "<VirtualDirectoryName> (<WebsiteName>)" from the properties of the virtual directory. You can specify the wildcard character (*) instead of the default website by using the syntax <VirtualDirectoryName>*.

The ActionForUnknownFileAndMIMETypes parameter specifies how to handle files that aren't included in other File Access Management lists.

The following values are valid for this parameter:

• Allow

• ForceSave

• Block

The ActiveSyncIntegrationEnabled parameter disables Exchange ActiveSync on the Options page in Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

The AdfsAuthentication parameter enables or disables Active Directory Federation Services (ADFS) authentication on the Outlook on the web virtual directory. Valid input for this parameter is $true or $false. The default value is $false.

The ADFS authentication settings for Set-OwaVirtualDirectory and Set-EcpVirtualDirectory are related. You need to set the AdfsAuthentication parameter on Set-EcpVirtualDirectory to $true before you can set the AdfsAuthentication parameter on Set-OwaVirtualDirectory to $true. Likewise, you need to set the AdfsAuthentication parameter on Set-OwaVirtualDirectory to $false before you can set the AdfsAuthentication parameter on Set-EcpVirtualDirectory to $false.

The AllAddressListsEnabled parameter specifies which address lists are available to the user.

You can use one of the following values:

• If set to $true, users can view all address lists.

• If set to $false, users can view only the global address list (GAL).

The default value is $true.

The AllowCopyContactsToDeviceAddressBook parameter specifies if users can copy the contents of their Contacts folder to a mobile device's native address book when using Outlook on the web for devices.

Valid input for this parameter is $true or $false. The default value is $true.

The AllowOfflineOn parameter specifies which computers can use Outlook on the web in offline mode. The possible values are:

• NoComputers

• AllComputers

• PrivateComputersOnly

The default value is AllComputers.

By default, Outlook on the web in Exchange 2016 assumes you are connecting from a private computer. In order to show the Private computer option at sign-in, you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true.

If the feature is enabled and users are using a supported browser, they can use Outlook on the web in offline mode. Users can turn the feature on or off in Outlook on the web. To turn the feature on, click the gear icon and then select Stop using offline. To turn the feature off, click the gear icon and then select Use mail offline. The supported browsers are Microsoft Internet Explorer 10, Safari 4, or Chrome 16. For more information, see Using Outlook Web App offline (https://go.microsoft.com/fwlink/p/?linkid=267644).

The AllowedFileTypes parameter specifies the extensions of file types that the user can save locally and view from a web browser. If the same extensions are in multiple settings lists, the most secure setting overrides the less secure settings.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The AllowedMimeTypes parameter specifies extensions of MIME attachments that users can save locally and view from a web browser. If the same extensions are in multiple settings lists, the most secure setting overrides the less secure settings.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The AnonymousFeaturesEnabled parameter specifies whether you want to allow Outlook on the web users that are logged on anonymously to access specific features. For example, if this value is set to $true, users logged on using anonymous authentication can view and change meeting content. This parameter is set to $true by default.

The BasicAuthentication parameter specifies whether Basic authentication is enabled on the virtual directory. Valid values are:

• $true: Basic authentication is enabled. This is the default value.

• $false: Basic authentication is disabled.

This parameter can be used with the FormsAuthentication parameter or with the DigestAuthentication and WindowsAuthentication parameters.

The BlockedFileTypes parameter specifies a list of extensions of attachments that are blocked. Attachments that contain these blocked extensions can't be saved locally or viewed from a web browser.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The BlockedMimeTypes parameter specifies a list of MIME extensions of attachments that are blocked. Attachments that contain these blocked MIME extensions can't be saved locally or viewed from a web browser.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

This parameter is reserved for internal Microsoft use.

The CalendarEnabled parameter specifies whether to enable the calendar for users.

Valid input for this parameter is $true or $false. The default value is $true.

The CalendarPublishingEnabled parameter specifies whether users can publish their calendar from Outlook Web App.

The ChangePasswordEnabled parameter specifies whether users can change their passwords from inside Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

The ClassicAttachmentsEnabled parameter specifies whether users can attach local files as regular email attachments. Valid values are:

• $true: Users can attach local files to email messages. This is the default value.

• $false: Users can't attach local files to email messages.

The ClientAuthCleanupLevel parameter specifies how much of the cache is cleared when the user logs off in Outlook on the web. This parameter doesn't apply to the light version of Outlook on the web.

The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.

• Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax: -Confirm:$false.

• Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you acknowledge the command before proceeding.

The ContactsEnabled parameter specifies whether Contacts are enabled for users.

Valid input for this parameter is $true or $false. The default value is $true.

The CrossSiteRedirectType parameter controls the method by which a Client Access server redirects a user's Web browser to Client Access server infrastructure in another Active Directory site.

You can use one of the following values:

• Silent

• Manual

If set to Silent, a user's Web browser is automatically redirected when the Client Access server redirects an Outlook Web App request to Client Access server infrastructure in another Active Directory site. If using forms-based authentication, SSL is required. For redirection to occur, the target Client Access server /owa virtual directory must have an ExternalURL value.

If set to Manual, users receive a notification that they are accessing the wrong URL and that they must click a link to access the preferred Outlook Web App URL for their mailbox. This notification occurs only when the Client Access server determines that it must redirect an Outlook Web App request to Client Access server infrastructure in another Active Directory site. For redirection to occur, the target Client Access server /owa virtual directory must have an ExternalURL value.

The default value is Manual.

This parameter is available or functional only in Exchange Server 2010.

The DefaultClientLanguage parameter, if set to a value other than 0, specifies the language used by Outlook Web App when a user who has not selected a specific language on the Options page signs in to Outlook Web App.

$null is not a valid value for this parameter.

The DefaultDomain parameter specifies which domain to use when the LogonFormat parameter is set to UserName.

The DefaultTheme parameter specifies the default theme used by Outlook on the web when the user hasn't selected a theme.

This parameter is available or functional only in Exchange Server 2010.

The DelegateAccessEnabled parameter specifies whether delegates can use Outlook Web App to open folders, which they have delegate access to, through this virtual directory.

Valid input for this parameter is $true or $false. The default value is $true.

The DigestAuthentication parameter specifies whether Digest authentication is enabled on the virtual directory. Valid values are:

• $true: Digest authentication is enabled.

• $false: Digest authentication is disabled. This is the default value.

This parameter can't be used with the FormsAuthentication parameter.

The DirectFileAccessOnPrivateComputersEnabled parameter specifies the left-click options on attachments. If this parameter is set to $true, Open is an available option. If it's set to $false, the Open option is disabled. The default value is $true.

By default, Outlook on the web in Exchange 2016 assumes you are connecting from a private computer. In order to show the Private computer option at sign-in, you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true.

The DirectFileAccessOnPublicComputersEnabled parameter specifies the left-click options on attachments when a user logs on after unchecking the Private computer option. If this parameter is set to $true, Open is an available option. If it's set to $false, the Open option is disabled. The default value is $true.

By default, Outlook on the web in Exchange 2016 assumes you are connecting from a private computer. Therefore, this parameter is meaningful only if you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true. This allows you to uncheck the Private computer option at sign-in, which indicates you are connecting from a public computer.

The DisplayPhotosEnabled parameter specifies whether users see sender photos in Outlook on the web. The possible values for this parameter are $true or $false. The default value is $true.

The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name (FQDN). For example, dc01.contoso.com.

This parameter is reserved for internal Microsoft use.

This parameter is available or functional only in Exchange Server 2010.

The Exchange2003Url parameter specifies the Outlook Web App URL for Exchange Server 2003 mailboxes. The URL must include the Outlook Web App virtual directory name, even if you're using a redirect to simplify the URL specified by the Exchange2003Url parameter.

This parameter is available or functional only in Exchange Server 2010.

The ExchwebProxyDestination parameter is no longer used and will be deprecated.

The ExplicitLogonEnabled parameter specifies whether to allow a user to open someone else's mailbox in Outlook on the web. If this parameter is set to $true, it allows a user to open someone else's mailbox in Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

The ExtendedProtectionFlags parameter specifies custom settings for Extended Protection for Authentication on the virtual directory. Valid values are:

• None: This is the default setting.

• AllowDotlessSPN: Required if you want to use Service Principal Name (SPN) values that don't contain FQDNs (for example, HTTP/ContosoMail instead of HTTP/mail.contoso.com). You specify SPNs with the ExtendedProtectionSPNList parameter. This setting makes Extended Protection for Authentication less secure because dotless certificates aren't unique, so it isn't possible to ensure that the client-to-proxy connection was established over a secure channel.

• NoServiceNameCheck: The SPN list isn't checked to validate a channel binding token. This setting makes Extended Protection for Authentication less secure. We generally don't recommend this setting.

• Proxy: A proxy server is responsible for terminating the SSL channel. To use this setting, you need to register an SPN by using the ExtendedProtectionSPNList parameter.

• ProxyCoHosting: HTTP and HTTPS traffic may be accessing the virtual directory, and a proxy server is located between at least some of the clients and the Client Access services on the Exchange server.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The ExtendedProtectionSPNList parameter specifies a list of valid Service Principal Names (SPNs) if you're using Extended Protection for Authentication on the virtual directory. Valid values are:

• $null: This is the default value.

• Single SPN or comma delimited list of valid SPNs: The SPN value format is <protocol>/<FQDN>. For example, HTTP/mail.contoso.com. To add an SPN that's not an FQDN (for example, HTTP/ContosoMail), you also need to use the AllowDotlessSPN value for the ExtendedProtectionFlags parameter.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The ExtendedProtectionTokenChecking parameter defines how you want to use Extended Protection for Authentication on the virtual directory. Extended Protection for Authentication isn't enabled by default. Valid values are:

• None: Extended Protection for Authentication isn't be used on the virtual directory. This is the default value.

• Allow: Extended Protection for Authentication is used for connections between clients and the virtual directory if both the client and server support it. Connections that don't support Extended Protection for Authentication will work, but may not be as secure as connections that use Extended Protection for Authentication.

• Require: Extended Protection for Authentication is used for all connections between clients and the virtual directory. If either the client or server doesn't support it, the connection will fail. If you use this value, you also need to set an SPN value for the ExtendedProtectionSPNList parameter.

Note:

If you use the value Allow or Require, and you have a proxy server between the client and the Client Access services on the Mailbox server that's configured to terminate the client-to-proxy SSL channel, you also need to configure one or more Service Principal Names (SPNs) by using the ExtendedProtectionSPNList parameter.

The ExternalAuthenticationMethods parameter restricts the authentication methods that can be used to connect to the virtual directory from outside the firewall. Valid values are:

• Adfs

• Basic

• Certificate

• Digest

• Fba

• Kerberos

• LiveIdBasic

• LiveIdFba

• LiveIdNegotiate

• NegoEx

• Negotiate

• Ntlm

• OAuth

• WindowsIntegrated

• WSSecurity

You can specify multiple values separated by commas.

Although you can specify any of these values, whether or not the authentication method actually works for external connections depends on other factors. For example:

• Is the authentication method available on the virtual directory?

• Is the authentication method available, but disabled on the virtual directory?

The ExternalDownloadHostName parameter specifies the download location for files in Outlook on the web for external users (for example, in-line image files).

The ExternalSPMySiteHostURL specifies the My Site Host URL for external users (for example, https://sp01.contoso.com).

This parameter is part of rich document collaboration that allows links to documents in OneDrive for Business to appear as regular file attachments in messages.

The ExternalURL parameter specifies the URL that's used to connect to the virtual directory from outside the firewall.

This setting is important when Secure Sockets Layer (SSL) is used.

The FailbackUrl parameter specifies the host name Outlook on the web uses to connect to the server after failback in a site resilience process and requires a separate DNS entry pointing to the original server's IP address. The FailbackUrl parameter must be different from the ExternalUrl parameter.

The FilterWebBeaconsAndHtmlForms parameter specifies how web beacons are handled. The possible values are UserFilterChoice, ForceFilter and DisableFilter.

The ForceSaveAttachmentFilteringEnabled parameter specifies whether files included in the list of extensions created by the ForceSaveFileTypes parameter are filtered before the user can save them.

Valid input for this parameter is $true or $false. The default value is $false.

The ForceSaveFileTypes parameter specifies a list of extensions of attachments that can be opened only after the file is saved locally on the user's computer.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The ForceSaveMimeTypes parameter specifies the MIME types of attachments that can be opened only after the file is saved locally on the user's computer.

The ForceWacViewingFirstOnPrivateComputers parameter specifies whether a user can open an Office file directly without first viewing it as a web page.

Valid input for this parameter is $true or $false. The default value is $false.

By default, Outlook on the web in Exchange 2016 assumes you are connecting from a private computer. In order to show the Private computer option at sign-in, you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true.

The ForceWacViewingFirstOnPublicComputers parameter specifies whether a user who logs on after unchecking the Private computer option can open an Office file directly without first viewing it as a web page.

Valid input for this parameter is $true or $false. The default value is $false.

By default, Outlook on the web in Exchange 2016 assumes you are connecting from a private computer. Therefore, this parameter is meaningful only if you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true. This allows you to uncheck the Private computer option at sign-in, which indicates you are connecting from a public computer.

The ForceWebReadyDocumentViewingFirstOnPrivateComputers parameter specifies whether a user can open a document directly without first viewing it as a web page.

Valid input for this parameter is $true or $false. The default value is $false.

By default, Outlook Web App in Exchange 2013 assumes you are connecting from a private computer. In order to show the Private computer option at sign-in, you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true.

The ForceWebReadyDocumentViewingFirstOnPublicComputers parameter specifies whether a user who logs on after unchecking the Private computer option can open a document directly without first viewing it as a web page.

Valid input for this parameter is $true or $false. The default value is $false.

By default, Outlook Web App in Exchange 2013 assumes you are connecting from a private computer. Therefore, this parameter is meaningful only if you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true. This allows you to uncheck the Private computer option at sign-in, which indicates you are connecting from a public computer.

The FormsAuthentication parameter enables or disables forms-based authentication on the Outlook on the web virtual directory.

Valid input for this parameter is $true or $false. The default value is $true.

If the FormsAuthentication parameter is set to $true, the BasicAuthentication parameter is set to $true, and the DigestAuthentication and WindowsAuthentication parameters are set to $false.

The FreCardsEnabled parameter specifies whether to enable or disable the theme, signature, and phone cards in Outlook on the web. Valid values are:

• $true: The theme, signature, and phone cards are visible in Outlook on the web. This is the default value.

• $false: The theme, signature, and phone cards aren't visible in Outlook on the web. Only the introduction, time zone, and final cards are visible.

The GlobalAddressListEnabled parameter specifies whether to show the global address list in Outlook on the web.

This parameter is reserved for internal Microsoft use.

The GzipLevel parameter sets Gzip configuration information for the Outlook on the web virtual directory.

The IRMEnabled parameter specifies whether the Information Rights Management (IRM) feature is enabled.

The InstantMessagingCertificateThumbprint parameter specifies the trusted certificate used to communicate between the instant messaging server and the Mailbox server. Use the Get-ExchangeCertificate cmdlet to find the thumbprint of the certificate.

The InstantMessagingEnabled parameter specifies whether to enable instant messaging in Outlook on the web.

The InstantMessagingServerName parameter specifies the fully qualified domain name (FQDN) of the instant messaging server or set of servers behind a load balancing device.

The InstantMessagingType parameter specifies the type of instant messaging provider to be used. Set this parameter to None for no provider and Ocs for Skype for Business. The Msn value is no longer used and will be deprecated.

The IntegratedFeaturesEnabled parameter specifies whether to allow Outlook on the web users who are logged on using Integrated Windows authentication to access specific features. For example, if this value is set to $true, users logged on using Integrated Windows authentication can view and change meeting content. This is set to $true by default.

The InternalDownloadHostName parameter specifies the download location for files in Outlook on the web for internal users (for example, in-line image files).

The InternalSPMySiteHostURL specifies the My Site Host URL for internal users (for example, https://sp01.contoso.com).

This parameter is part of rich document collaboration that allows links to documents in OneDrive for Business to appear as regular file attachments in messages.

The InternalURL parameter specifies the URL that's used to connect to the virtual directory from inside the firewall.

This setting is important when SSL is used.

The IsPublic parameter specifies whether external users use the virtual directory for Outlook on the web in multiple virtual directory environments (you've configured separate virtual directories on the same server for internal vs. external Outlook on the web connections). Valid values are:

• $true: External users use the virtual directory for Outlook on the web.

• $false: External users don't use the virtual directory for Outlook on the web.

The JournalEnabled parameter specifies whether the Journal folder is visible.

The JunkEmailEnabled parameter specifies whether the Junk Email management tools are enabled.

The LegacyRedirectType parameter specifies the type of redirect that Outlook Web App uses to a legacy Client Access server or Front End server when forms-based authentication isn't used on the Exchange 2010 Outlook Web App virtual directory.

The following values are valid for this parameter:

• Silent

• Manual

Silent causes a standard redirect. Manual displays an intermediate page that shows the legacy URL so that users can change their bookmarks.

The LiveIdAuthentication parameter specifies whether to configure Outlook Web App to use logon via Windows Live ID. Set this parameter to $true to configure Outlook Web App to use logon via Windows Live ID.

The LogonAndErrorLanguage parameter specifies which language Outlook on the web uses for forms-based authentication and for error messages that occur when a user's current language setting can't be read. When this parameter has a value of 0, the language selection is undefined.

The LogonFormat parameter specifies the type of logon format forms-based authentication must use on the Outlook on the web sign-in page.

Possible attributes are FullDomain, UserName, or PrincipalName.

If you specify the FullDomain attribute, the User name field on the Outlook on the web sign-in page requires the user name to be entered in the format domain\user name.

If you specify the UserName attribute, you must also specify the DefaultDomain parameter.

If you specify the PrincipalName attribute, the User name field on the Outlook on the web sign-in page requires a user principal name (UPN) address. This sign-in method works only for users whose UPN name is the same as their email address.

The LogonPageLightSelectionEnabled parameter specifies whether the Outlook on the web sign-in page includes the option to sign in to the light version of Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

The LogonPagePublicPrivateSelectionEnabled parameter specifies whether the Outlook on the web sign-in page includes the Private computer option at sign-in. By default,

Valid input for this parameter is $true or $false. The default value is $false. By default, Exchange assumes you are connecting from a private computer.

To make the Private computer option available to check or uncheck, set the value of this parameter to $true, and then restart IIS.

The NotesEnabled parameter specifies whether the Notes folder is visible in Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

This parameter is available or functional only in Exchange Server 2010.

The NotificationInterval parameter specifies the polling frequency, in seconds, with which the client must poll the server for new item notifications, reminder updates, and session time-out information in Outlook Web App. This parameter doesn't apply to the light version of Outlook Web App.

This parameter is reserved for internal Microsoft use.

This parameter is available or functional only in Exchange Server 2010.

The OWALightEnabled parameter, when set to $false, removes the option to use the light version of Outlook Web App from the logon page and removes the Accessibility check box from the General Options tab. This parameter doesn't apply to Outlook Web App.

This parameter controls whether the mini version of Outlook Web App is enabled.

This parameter is reserved for internal Microsoft use.

When the OrganizationEnabled parameter is set to $false, the Automatic Reply option doesn't include external and internal options, the address book doesn't show the organization hierarchy, and the Resources tab in Calendar forms is disabled. The default value is $true.

The OutboundCharset parameter specifies the character set that's used for outgoing messages in Outlook on the web. Valid values are:

• AutoDetect: Examine the first 2 kilobytes (KB) of text in the message to determine the character set that's used in outgoing messages. This is the default value.

• AlwaysUTF8: Always use UTF-8 encoded UNICODE characters in outgoing messages, regardless of the detected text in the message, or the user's language choice in Outlook on the web. Use this value if replies to UTF-8 encoded messages aren't being encoded in UTF-8.

• UserLanguageChoice: Use the user's language choice in Outlook on the web to encode outgoing messages.

This parameter is available or functional only in Exchange Server 2010.

The PremiumClientEnabled parameter specifies whether a user can access Outlook Web App. This parameter doesn't apply to the light version of Outlook Web App.

The PublicFoldersEnabled parameter specifies whether a user can browse or read items in public folders using Outlook on the web.

By default, the PublicFoldersEnabled parameter is set to $true. If the PublicFoldersEnabled parameter is set to $false, users can only access their private mailboxes in Outlook on the web.

This parameter is available or functional only in Exchange Server 2010.

The RecoverDeletedItemsEnabled parameter specifies whether a user can use Outlook Web App to view, recover, or delete permanently items that have been deleted from the Deleted Items folder. By default, the RecoverDeletedItemsEnabled parameter is set to $true. If the RecoverDeletedItemsEnabled parameter is set to $false, the items deleted from the Deleted Items folder are retained. However, users can't view, recover, or permanently delete them using Outlook Web App.

The RedirectToOptimalOWAServer parameter, when set to $true, causes Outlook on the web to use service discovery to find the best Mailbox server to use after a user authenticates. If redirection is disabled, Outlook on the web doesn't redirect clients to the most optimal Mailbox server.

Valid input for this parameter is $true or $false. The default value is $true.

The ReferenceAttachmentsEnabled parameter specifies whether users can attach files from the cloud as linked attachments. Valid values are:

• $true: Users can attach files that are stored in the cloud as linked attachments. If the file hasn't been uploaded to the cloud yet, the users can attach and upload the file in the same step. This is the default value.

• $false: Users can't share files in the cloud as linked attachments. They need to download a local copy of the file before attaching the file to the email message.

The RemindersAndNotificationsEnabled parameter specifies whether notifications and reminders are enabled in Outlook on the web. This parameter doesn't apply to the light version of Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

This parameter is available or functional only in Exchange Server 2010.

The RemoteDocumentsActionForUnknownServers parameter isn't available in this release.

This parameter is available or functional only in Exchange Server 2010.

The RemoteDocumentsAllowedServers parameter isn't available in this release.

This parameter is available or functional only in Exchange Server 2010.

The RemoteDocumentsBlockedServers parameter isn't available in this release.

This parameter is available or functional only in Exchange Server 2010.

The RemoteDocumentsInternalDomainSuffixList parameter isn't available in this release.

The ReportJunkEmailEnabled parameter specifies whether users can report messages as junk to Microsoft in Outlook on the web. Valid input for this parameter is $true or $false. The default value is $true.

If you set this parameter to $false, the Report mail as junk window doesn't appear after users select Mark as junk. This parameter is meaningful only when the JunkEmailEnabled parameter is set to $true.

The RulesEnabled parameter specifies whether a user can view, create, or modify server-side rules using Outlook on the web. By default, the RulesEnabled parameter is set to $true. If the RulesEnabled parameter is set to $false, users must use Microsoft Outlook to view, create, and modify server-side rules.

This parameter is available or functional only in Exchange Server 2010.

The SMimeEnabled parameter specifies whether users can download the S/MIME control for Outlook Web App and use it to read and compose signed and encrypted messages. By default, the SMimeEnabled parameter is set to $true. If the SMimeEnabled parameter is set to $false, users are unable to read or compose messages that are opaque-signed or encrypted. Messages that are clear-signed can be read but not composed, and their signatures aren't validated.

Note: In Exchange 2013 or later, use the Get-SmimeConfig and Set-SmimeConfig cmdlets to configure the S/MIME settings in Outlook on the web. For more information, see S/MIME for message signing and encryption (https://technet.microsoft.com/library/dn626158.aspx).

The SaveAttachmentsToCloudEnabled parameter specifies whether users can save regular email attachments to the cloud. Valid values are:

• $true: Users can save regular email attachments to the cloud. This is the default value.

• $false: Users can only save regular email attachments locally.

The SearchFoldersEnabled parameter specifies whether Search Folders are available in Outlook on the web.

The SetPhotoEnabled parameter specifies whether users can add, change, and remove their sender photo in Outlook on the web. The possible values for this parameter are $true or $false. The default value is $false. When this value is set to $true, users can manage their sender photo using two methods. They can click their name in the upper-right corner of Outlook on the web, click change, and then browse to the photo they want to use. Alternatively, users can manage their photo by clicking the gear icon in the upper-right corner of Outlook on the web, and then clicking Options > Account > My account > Edit > Change.

The SetPhotoURL parameter specifies the location of the user photos. This value isn't set by default.

The SignaturesEnabled parameter specifies whether to enable or disable the use of signatures in Outlook on the web.

This parameter is available or functional only in Exchange Server 2010.

The SilverlightEnabled parameter specifies whether a user can use Microsoft Silverlight features in Outlook Web App.

This parameter is available or functional only in Exchange Server 2010.

The SpellCheckerEnabled parameter specifies whether a user can check spelling in Outlook Web App. This parameter doesn't apply to the light version of Outlook Web App.

The TasksEnabled parameter specifies whether a user can use the Tasks feature in Outlook on the web. This parameter doesn't apply to the light version of Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

The TextMessagingEnabled parameter specifies whether users can send and receive text messages. This parameter doesn't apply to the light version of Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

The ThemeSelectionEnabled parameter specifies whether users can select a theme in Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

The UMIntegrationEnabled parameter specifies whether Unified Messaging is enabled on Outlook on the web. This setting applies only if Unified Messaging has been enabled for a user using the Enable-UMMailbox cmdlet. This parameter doesn't apply to the light version of Outlook on the web.

Valid input for this parameter is $true or $false. The default value is $true.

This parameter is available or functional only in Exchange Server 2010.

The UNCAccessOnPrivateComputersEnabled parameter isn't available in this release.

This parameter is available or functional only in Exchange Server 2010.

The UNCAccessOnPublicComputersEnabled parameter isn't available in this release.

The UseGB18030 parameter specifies when to use the character set GB18030. This parameter is a character-handling registry key that works in coordination with the OutboundCharset registry key. When the UseGB18030 parameter is set to $true, the character set GB18030 is used wherever GB2312 would have been used. The default value is $false.

The UseISO885915 parameter specifies when to use the character set ISO8859-15. This parameter is a character-handling registry key that works in coordination with the OutboundCharset registry key. When the UseISO885915 parameter is set to $true, the character set ISO8859-15 is used wherever ISO8859-1 would have been used. The default value is $false.

The UserContextTimeout parameter specifies the time-out setting, in minutes, for a user context object. This parameter doesn't limit public and private forms-based authentication time-out settings.

This parameter is available or functional only in Exchange Server 2010.

The VirtualDirectoryType parameter description isn't available in this release.

This parameter is available or functional only in Exchange Server 2010.

The WSSAccessOnPrivateComputersEnabled parameter isn't available in this release.

This parameter is available or functional only in Exchange Server 2010.

The WSSAccessOnPublicComputersEnabled parameter isn't available in this release.

The WacEditingEnabled parameter specifies whether to enable or disable editing documents in Outlook on the web by using Office Online Server (formerly known as Office Web Apps Server and Web Access Companion Server). Valid values are:

• $true: Users can edit supported documents in Outlook on the web. This is the default value.

• $false: Users can't edit supported documents in Outlook on the web

The WacViewingOnPrivateComputersEnabled parameter specifies whether to enable or disable web viewing of supported Office documents in private computer sessions. Valid values are:

• $true: In private computer sessions, users can view supported Office documents in the web browser. This is the default value.

• $false: In private computer sessions, users can't view supported Office documents in the web browser. Users can still open the file in a supported application, or save the file locally.

By default, Outlook on the web in Exchange 2016 assumes you are connecting from a private computer. In order to show the Private computer option at sign-in, you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true.

The WacViewingOnPublicComputersEnabled parameter specifies whether to enable or disable web viewing of supported Office documents in public computer sessions. Valid values are:

• $true: In public computer sessions, users can view supported Office documents in the web browser. This is the default value.

• $false: In public computer sessions, users can't view supported Office documents in the web browser. Users can still open the file in a supported application, or save the file locally.

By default, Outlook on the web in Exchange 2016 assumes you are connecting from a private computer. Therefore, this parameter is meaningful only if you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true. This allows you to uncheck the Private computer option at sign-in, which indicates you are connecting from a public computer.

The WebPartsFrameOptionsType parameter specifies what sources can access Outlook on the web web parts in IFRAME or FRAME elements.

Valid values are:

• None: This indicates that there are no restrictions on displaying Outlook on the web content in a frame.

• SameOrigin: This is the default value and the recommended value. This allows display of Outlook on the web content only in a frame that has the same origin as the content.

• Deny: This blocks display of Outlook on the web content in a frame regardless of the origin of the site attempting to access it.

• AllowFrom: This isn't yet available. It will be implemented in a later release.

The WebReadyDocumentViewingForAllSupportedTypes parameter enables WebReady Document Viewing for all supported file and MIME types. If this parameter is set to $false, use the WebReadyFileTypes and WebReadyMimeTypes parameters to set which file and MIME types to convert.

Valid input for this parameter is $true or $false. The default value is $true.

The WebReadyDocumentViewingOnPrivateComputersEnabled parameter enables or disables WebReady Document Viewing.

Valid input for this parameter is $true or $false. The default value is $true.

By default, Outlook Web App in Exchange 2013 assumes you are connecting from a private computer. In order to show the Private computer option at sign-in, you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true.

The WebReadyDocumentViewingOnPublicComputersEnabled parameter enables or disables WebReady Document Viewing for a user who logs on after unchecking the Private computer option.

Valid input for this parameter is $true or $false. The default value is $true.

By default, Outlook Web App in Exchange 2013 assumes you are connecting from a private computer. Therefore, this parameter is meaningful only if you set the LogonPagePublicPrivateSelectionEnabled parameter to the value $true. This allows you to uncheck the Private computer option at sign-in, which indicates you are connecting from a public computer.

The read-only WebReadyDocumentViewingSupportedFileTypes parameter lists the file types supported by the conversion engine.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The read-only WebReadyDocumentViewingSupportedMimeTypes parameter lists the MIME types supported by the conversion engine.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The WebReadyFileTypes parameter creates a list of file types on which WebReady Document Viewing is performed.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The WebReadyMimeTypes parameter creates a list of MIME types on which WebReady Document Viewing is performed.

To enter multiple values and overwrite any existing entries, use the following syntax: <value1>,<value2>,...<valueN>. If the values contain spaces or otherwise require quotation marks, you need to use the following syntax: "<value1>","<value2>",..."<valueN">.

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="<value1>","<value2>"...; Remove="<value1>","<value2>"...}.

The WhatIf switch simulates the actions of the command. You can use this switch to view the changes that would occur without actually applying those changes. You don't need to specify a value with this switch.

The WindowsAuthentication parameter enables or disables Integrated Windows authentication on the Outlook on the web virtual directory.

Valid input for this parameter is $true or $false. The default value is $false.