Receiving the following error in the logs after a few hours of exchange being started:
Event Type: Error
Event Source: MSExchangeSA
Event Category: MAPI Session
Event ID: 9175
The MAPI call 'OpenMsgStore' failed with the following error:
The attempt to log on to the Microsoft Exchange Server computer has failed.
The MAPI provider failed.
Microsoft Exchange Server Information Store
ID no: 8004011d-0512-00000000
For more information, click http://www.microsoft.com/contentredirect.asp.
(Exchange 2003, SBS2003)
I have restarted the Microsoft Exchange Information Store service, which fixes the problem for a short while but this is by no means a 'fix'. Any ideas on the cause?