We have a situation where we had two Exchange 2010 servers for a while. The old one had some storage problems and we hurriedly migrated users to a new server. The old server has been completely decommissioned. Outlook and email function properly, except people get a "Trying to connect to Microsoft Exchange" message occasionally in the status bar. When I view the Outlook Connection Status, it is attempting to connect to our old mail server with a status of Referral. It repeats for a while and then the message disappears from the connection monitor and the Outlook status goes back to Connected to Microsoft Exchange.
I have attached screenshots of the symptoms.
I need help determining where this old setting is and how to remove it. Thank you.