Disable voice mail for a user in Exchange Online
You can disable Unified Messaging (UM) for a UM-enabled user. When you do this, the user can no longer use the voice mail features found in Unified Messaging. If you prefer, when you disable UM for a user, you can keep the UM settings for the user.
For additional management tasks related to users who are enabled for voice mail, see Voice mail-enabled user procedures.
What do you need to know before you begin?
Estimated time to complete: Less than 1 minute.
You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "UM mailboxes" entry in the Unified Messaging Permissions topic.
Before you perform this procedure, confirm that a UM dial plan has been created. For detailed steps, see Create a UM dial plan.
Before you perform this procedure, confirm that a UM mailbox policy has been created. For detailed steps, see Create a UM mailbox policy.
Before you perform these procedures, confirm that the existing user is currently enabled for Unified Messaging. For detailed steps, see Enable a user for voice mail.
For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard shortcuts for the Exchange admin center.
Use the EAC to disable Unified Messaging and voice mail for a user
In the EAC, click Recipients.
In the list view, select the user whose mailbox you want to disable for Unified Messaging.
In the Details pane, under Phone and Voice Features, under Unified Messaging, click Disable.
In the Warning box, click Yes to confirm that Unified Messaging will be disabled for the user.
Use Exchange Online PowerShell to disable Unified Messaging and voice mail for a user
This example disables Unified Messaging and voice mail for the user email@example.com, but keeps the UM mailbox settings.
Disable-UMMailbox -Identity firstname.lastname@example.org -KeepProperties $True