I've never needed to do this, but you should be able to look at the attributes associated with the users and manually remove them.
dsquery * domainroot -filter "samaccountname=whatever" -attr * you can't copy and paste because outlook screws up the dashes. Look at one user who is ok and several who aren't. Determine the salient attributes. Clear them using your tool of choice. Be careful. :) From: [email protected] [mailto:[email protected]] On Behalf Of Jonathan Raper Sent: Wednesday, May 6, 2015 5:28 PM To: [email protected]; [email protected] Subject: [Exchange] Disable EUM on a mailbox after the UM server has been decommissioned? Hi all, We have Exchange 2007 and are in the process of migrating to O365 via 2013 Hybrid servers. In our preparations, we have discovered that about a dozen users are enabled for Exchange Unified Messaging...... The only problem is that the Unified Messaging servers were fully and gracefully decommissioned and removed from AD about 3 years ago! The Management Console and the shell both bark about not being able to reach the messaging server, and so I can't disable the UM feature from the mailboxes in the normal way. Aside from Exporting the mailbox to a PST, deleting and recreating the mailbox, and then re-importing the mail.....is there any other way around this? Thanks, Jonathan
