I work at a large software company doing tech support for employee's. This was and has been a huge issue for us. That exact error message usually is in regards to too many MAPI sessions being created on the exchange server. In my companies case the limit is 32. I cannot Guarnieri that this is your problem but if you think it might be try this fix:
What happens is that everytime you connect your
Outlook to the server 4 sessions are created, after 32 are created you
are then locked out of the server. Any type of disruption in your
connection can cause this, i.e. using wireless or any problems with the
VPN etc. Make the following
changes to the Outlook profile:
1. On the Tools menu, click E-mail accounts, select View or change
existing e-mail accounts, click Next, select the Exchange e-mail account,
and then click Change.
2. Click More Settings, then click the Security tab.
3. Under Encryption, select the Encrypt data between Microsoft Office
Outlook and Microsoft Exchange Server check box.
Note that this will not automatically enable your Outlook to
connect to the Exchange server, but will help to resolve the issue in
the future. For now please either close your Outlook or set it to
Work Offline so more connections are not made and hopefully within an
hour your connections will be dropped and you can access Outlook
normally again.
