I have recently demoted an Exchange 2010 server and removed it from the network. I have an Exchange 2013 server in the environment that I had imported the mailboxes from. Exchange 2013 is operating properly except my users receive the error message, the Microsoft exchange administrator has made a change that requires you quit and restart outlook. After clicking OK and restarting outlook it comes right back again. We receive this message on Outlook 2010 and 2013. I have also tried repairing the Outlook account and the message still appears.
Thanks in advance!