Voice mail-enabled user procedures in Exchange Online

Enable a user for voice mail

Include text with the email message sent when a user Is enabled for voice mail

Manage voice mail settings for a user

Assign a UM mailbox policy

Change the UM dial plan

Enable calls from users who aren't UM-enabled

Disable calls from users who aren't UM-enabled

Allow callers without a caller ID to leave a voice message

Include text with the email message sent when a voice message Is received

Prevent callers without a caller ID from leaving a voice message

Disable voice mail for a user

Change a SIP address

Change an extension number

Add a SIP address

Remove a SIP address

Add an extension number

Remove an extension number

Change an E.164 number

Add an E.164 number

Remove an E.164 number