Hello
I'm getting in touch about an issue that is affecting a number of end users at the academic institution where I work. Outlook 2010 (appears to be) randomly disconnecting from our corporate Exchange 2010 mail server and asking for reauthentication via a dialog box requesting a username and password. Sometimes adding this login information does not make any difference and you have to force the application to shut down. There is one particular user (see below) who regularly disconnects every day, often around 10 minutes after logging in, who has been the main test subject for all our attempts to resolve this matter. He has a Dell Optiplex 780 Windows 7 32-Bit machine.
We have tried the following with him:
Removing settings from Credential Manager, changing Outlook proxy settings, Outlook profile reset, domain profile reset, a machine rebuild, using a different machine, os power settings, network adapter power settings, removing specific Active Directory policies, changing load balancer configuration, changing network point and ethernet cable.
I am at a loss for what could be the cause? These disconnections appear to have started after migrating from Exchange 2007 to v2010 late last year but this may just be coincidental. We have been informed by our central IT service that this is localised to our department but the evidence suggests otherwise. The user mentioned has had problems on machines not under our own supervision.
If anybody has any suggestions I'd be very grateful.