Exchange Server 2003 cannot mount mailstore


Problem:

On the Exchange 2003 server I managed, users cannot read the email.  After checking the Windows Event log, I received the below error:

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Event Type: Error
Event Source: MSExchangeSA
Event Category: MAPI Session
Event ID: 9175
Date:
Time:
User: N/A
Computer: Computer_name
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

Reason:

It is because the running number of the log file name has exausted (running to E00FFFFF.log).  The system cannot create new log file and error is generated.
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Resolution:

To solve the problem, we must reset the running number:
  1. For each storage group, identitfy the log files location.
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  2. For each mailstore, Identify the location of the mail DB file:  Right click the mailstore and select properties.
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  3. Under Exchange System Manager, locate the affected mailstore.  Then select “Dismount”.
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  4. Check the mailstore DB status
    eseutil /mh filename.edb
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    Ensure it is a clean shutdown.  (Reference: Microsoft)
  5. Move all *.log to another folder.  So that the system will start the log file name from beginning.
  6. Mount the mailstore again.

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