You like to remove a mailbox server from DAG (Database Availability Group). However, when performing the removal task, you get the error: Mailbox server cannot be removed from the Database Availability Group because mailbox database has multiple copies. Use Remove-MailboxDatabaseCopy…

The task is to change the Exchange Server DAG witness server to another server. Why is that? One of the reasons is that the witness server is not booting anymore. Another reason is that you want to decommission the server.…