I have disabled a mailbox today and I would like to reconnect it. However, this mailbox is not showing up in disconnected mailboxes. There is only one mailbox showing up in disconnected mailboxes no matter how many are disabled. I read that this clean-mailboxdatabase command will resolve that. When trying to run it I am getting the error in the picture below.
I am wondering what the issue could be here.. if anyone has an idea please let me know.