At 08:59hrs this morning I got a call from a customer who was unable to receive e-mail. Logging into their server I discovered that there were indeed messages stuck in the Local Delivery queue. I checked the Application event logs and found the following event log
Event Type: Error
Event
Source:
MSExchangeSA
Event
Category:
MAPI Session
Event
ID:
9175
Date:
8/05/2012
Time: 9:12:31
AM
User: N/A
Computer:
***DELETED***
Description:
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.
Further investigation led to an un-mounted mail store.It was relatively easy to re-mount the store, however the support link at http://support.microsoft.com/kb/896143 leads me to think it may not be so easy all the time. After getting the service back up and running, I re-visited the logs to find that the event started at approximately 23:22hrs last night, and was preceded by the following message;
Event
Type:
Error
Event
Source:
MSExchangeSA
Event
Category:
Monitoring
Event
ID:
1005
Date:
7/05/2012
Time: 11:22:24
PM
User: N/A
Computer:
***DELETED***
Description:
Unexpected
error <<0xc1050000 - 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>>
occurred.
For
more information, click
http://www.microsoft.com/contentredirect.asp.
The support link at http://support.microsoft.com/kb/888179 did not provide much assistance in resolving the issue permanently, but I did check the allocated space and size of the mail store and the available space on disk and they were all OK.