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Set-ADForestMode

Set-ADForestMode

Sets the forest mode for an Active Directory forest.

Syntax

Set-ADForestMode [-Identity] <ADForest> [-ForestMode] {<Windows2000Forest> | <Windows2003InterimForest> | <Windows2003Forest> | <Windows2008Forest> | <Windows2008R2Forest> | <UnknownForest>} [-AuthType {<Negotiate> | <Basic>}] [-Credential <PSCredential>] [-PassThru <switch>] [-Server <string>] [-Confirm] [-WhatIf] [<CommonParameters>]
  • Identity

  • ForestMode

  • AuthType

  • Credential

  • PassThru

  • Server

  • Confirm

  • WhatIf

Detailed Description

The Set-ADForestMode cmdlet sets the Forest mode for an Active Directory forest. You specify the forest mode by setting the ForestMode parameter. The forest mode can be set to the following values that are listed in order of functionality from lowest to highest.
Windows2000Forest
Windows2003InterimForest
Windows2003Forest
Windows2008Forest
Windows2008R2Forest

The Identity parameter specifies the Active Directory forest to modify. You can identify a forest by its fully qualified domain name (FQDN), GUID, DNS host name, or NetBIOS name. You can also specify the forest by passing a forest object through the pipeline. For example, you can use the Get-ADForest cmdlet to retrieve a forest object and then pass the object through the pipeline to the Set-ADForestMode.

Set-ADForestMode will prompt for confirmation by default.

Parameters

AuthType

Specifies the authentication method to use. Possible values for this parameter include:
Negotiate or 0
Basic or 1

The default authentication method is Negotiate.

A Secure Sockets Layer (SSL) connection is required for the Basic authentication method.

The following example shows how to set this parameter to Basic.
-AuthType Basic

The following lists the acceptable values for this parameter:

  • Negotiate**

  • Basic**

Default Value: Microsoft.ActiveDirectory.Management.AuthType.Negotiate

Data Type: ADAuthType

Attributes

Name Value PSMAML Attribute

Required?

false

required

Variable Length?

false

variableLength

Accept wildcard characters?

false

globbing

Accept Pipeline Input?

false

pipelineInput

Position?

named

position

Value Attributes

Name Value PSMAML Attribute

Required?

true

required

Variable Length?

false

variableLength

Credential

Specifies the user account credentials to use to perform this task. The default credentials are the credentials of the currently logged on user unless the cmdlet is run from an Active Directory PowerShell provider drive. If the cmdlet is run from such a provider drive, the account associated with the drive is the default.

To specify this parameter, you can type a user name, such as "User1" or "Domain01\User01" or you can specify a PSCredential object. If you specify a user name for this parameter, the cmdlet prompts for a password.

You can also create a PSCredential object by using a script or by using the Get-Credential cmdlet. You can then set the Credential parameter to the PSCredential object The following example shows how to create credentials.
$AdminCredentials = Get-Credential "Domain01\User01"

The following shows how to set the Credential parameter to these credentials.
-Credential $AdminCredentials

If the acting credentials do not have directory-level permission to perform the task, Active Directory PowerShell returns a terminating error.

Default Value: **

Data Type: PSCredential

Attributes

Name Value PSMAML Attribute

Required?

false

required

Variable Length?

false

variableLength

Accept wildcard characters?

false

globbing

Accept Pipeline Input?

false

pipelineInput

Position?

named

position

Value Attributes

Name Value PSMAML Attribute

Required?

true

required

Variable Length?

false

variableLength

ForestMode

Specifies the forest mode for an Active Directory forest. The possible values for this parameter are: Windows2000Forest or 0
Windows2003InterimForest or 1
Windows2003Forest or 2
Windows2008Forest or 3
Windows2008R2Forest or 4

The values are listed in order of functionality from least to most.

The following example shows how to set this parameter.
-ForestMode Windows2008R2Forest

The following lists the acceptable values for this parameter:

  • Windows2000Forest**

  • Windows2003InterimForest**

  • Windows2003Forest**

  • Windows2008Forest**

  • Windows2008R2Forest**

  • UnknownForest**

Default Value: **

Data Type: ADForestMode

Attributes

Name Value PSMAML Attribute

Required?

true

required

Variable Length?

false

variableLength

Accept wildcard characters?

false

globbing

Accept Pipeline Input?

false

pipelineInput

Position?

3

position

Value Attributes

Name Value PSMAML Attribute

Required?

true

required

Variable Length?

false

variableLength

Identity

Specifies an Active Directory forest object by providing one of the following attribute values. The identifier in parentheses is the LDAP display name for the attribute.

Fully qualified domain name
Example: corp.contoso.com
GUID (objectGUID)
Example: 599c3d2e-f72d-4d20-8a88-030d99495f20
DNS host name
Example: dnsServer.corp.contoso.com
NetBIOS name
Example: corp

The cmdlet searches the default naming context or partition to find the object. If two or more objects are found, the cmdlet returns a non-terminating error.

This parameter can also get this object through the pipeline or you can set this parameter to a forest object instance.

This example shows how to set the parameter to a fully qualified domain name.
-Identity "corp.contoso.com"

This example shows how to set this parameter to a forest object instance named "forestInstance".
-Identity $forestInstance

Default Value: **

Data Type: ADForest

Attributes

Name Value PSMAML Attribute

Required?

true

required

Variable Length?

false

variableLength

Accept wildcard characters?

false

globbing

Accept Pipeline Input?

true (ByValue)

pipelineInput

Position?

1

position

Value Attributes

Name Value PSMAML Attribute

Required?

true

required

Variable Length?

false

variableLength

PassThru

Returns the new or modified object. By default (i.e. if -PassThru is not specified), this cmdlet does not generate any output.

Default Value: **

Data Type: switch

Attributes

Name Value PSMAML Attribute

Required?

false

required

Variable Length?

false

variableLength

Accept wildcard characters?

false

globbing

Accept Pipeline Input?

false

pipelineInput

Position?

named

position

Value Attributes

Name Value PSMAML Attribute

Required?

true

required

Variable Length?

false

variableLength

Server

Specifies the Active Directory Domain Services instance to connect to, by providing one of the following values for a corresponding domain name or directory server. The service may be any of the following: Active Directory Lightweight Domain Services, Active Directory Domain Services or Active Directory Snapshot instance.
Domain name values:
Fully qualified domain name
Examples: corp.contoso.com
NetBIOS name
Example: CORP

Directory server values:
Fully qualified directory server name
Example: corp-DC12.corp.contoso.com
NetBIOS name
Example: corp-DC12
Fully qualified directory server name and port
Example: corp-DC12.corp.contoso.com:3268

The default value for the Server parameter is determined by one of the following methods in the order that they are listed:
-By using Server value from objects passed through the pipeline.
-By using the server information associated with the Active Directory PowerShell provider drive, when running under that drive.
-By using the domain of the computer running Powershell.

The following example shows how to specify a full qualified domain name as the parameter value.
-Server "corp.contoso.com"

Default Value: **

Data Type: string

Attributes

Name Value PSMAML Attribute

Required?

false

required

Variable Length?

false

variableLength

Accept wildcard characters?

false

globbing

Accept Pipeline Input?

false

pipelineInput

Position?

named

position

Value Attributes

Name Value PSMAML Attribute

Required?

true

required

Variable Length?

false

variableLength

Confirm

Prompts you for confirmation before executing the command.

Default Value: **

Data Type: SwitchParameter

Attributes

Name Value PSMAML Attribute

Required?

false

required

Variable Length?

true

variableLength

Accept wildcard characters?

false

globbing

Accept Pipeline Input?

false

pipelineInput

Position?

named

position

Value Attributes

Name Value PSMAML Attribute

Required?

false

required

Variable Length?

false

variableLength

WhatIf

Describes what would happen if you executed the command without actually executing the command.

Default Value: **

Data Type: SwitchParameter

Attributes

Name Value PSMAML Attribute

Required?

false

required

Variable Length?

true

variableLength

Accept wildcard characters?

false

globbing

Accept Pipeline Input?

false

pipelineInput

Position?

named

position

Value Attributes

Name Value PSMAML Attribute

Required?

false

required

Variable Length?

false

variableLength

Input Type

None or Microsoft.ActiveDirectory.Management.ADForest

A forest object is received by the Identity parameter.

Return Type

None or Microsoft.ActiveDirectory.Management.ADForest

Returns the modified forest object when the PassThru parameter is specified. By default, this cmdlet does not generate any output.

Notes

  • This cmdlet does not work with AD LDS.
    This cmdlet does not work with an Active Directory Snapshot.
    This cmdlet does not work with a read-only domain controller

Examples

-------------------------- EXAMPLE 1 --------------------------

Command Prompt: C:\PS>

Set-ADForestMode -Identity fabrikam.com -ForestMode Windows2003Forest


                          

Set the ForestMode to Windows2003Forest in the forest fabrikam.com.

-------------------------- EXAMPLE 2 --------------------------

Command Prompt: C:\PS>

$currentForest = Get-ADForest 

Set-ADForestMode -Identity $currentForest -Server $currentForest.SchemaMaster -ForestMode Windows2008R2Forest 


                          

Set the forest mode of the current logged on user's forest. The Set operation targets the Schema Master FSMO to apply the update.

See Also

Reference

Get-ADForest

Other Resources

Online version: