When you have trouble with MS Exchange 2000 Server, main target of corruption becomes the Exchange database file mainly Priv1.edb store. In case Exchange Server doesn't mount, as a first step rebooting comes in the mind. Rebooting is done but to surprise private store gets inaccessible as database file gets corrupt. After that performing repair or defragmentation further worsens the situation and you get the MAPI error namely 'OpenMsgStore' failed... error.
Actually, "OpenMsgStore" is one of the methods associated with MAPI working interface that is used to open a message store in Exchange mailbox. This method results a reference that is passed to ImsgStore object for further access. After that we get access to our mailbox email items (received or sent). But when problem occurs in this method, trouble crops up in Exchange database.
You may encounter the given event log description displaying in the application event log of Exchange Server computer:
The MAPI call 'OpenMsgStore' failed with the following error:
The Microsoft Exchange database computer is not available. Either there are network problems or the Microsoft Exchange Server computer is down for maintenance. The MAPI provider failed.
Microsoft Exchange Server Information Store
ID no: 8004011d-0526-00000000
Event ID for this error is 9175 and is specific to Microsoft Exchange 2000 and 2003.
This error event log appears every single minute thus leaving us perplexed. Every time OpenMsgStore method fails, an application log is generated that records Exchange database computer events. For finding out the root cause of Exchange's debacle this application log can be studied. Corruption in the message store is the foremost reason for this behavior.
Well the reason behind this erroneous situation is stopped working of IS (Information Store). Or other solid reason could be the failure of mailbox store to mount onto the mail. The Information Store may stop due to the following possible reasons: You might be using an expired evaluation version of edb software, The store is dismounted and/or corrupted, The partition storing the IS files is less than or equal to 10 MB in size, Information Store is in dirty shutdown state, etc.
Not to worry, apply the following changes and see the results if they are successful in resolving such situation. Otherwise you would be required to restore Exchange database for recovering database file.
Use the activated version of Exchange Server.
Backup your store and run ESEUTIL/p command to repair it. The command can delete the corrupted pages and cause data loss.
Check for IS partition is greater than 10 MB in size.
Replay all the transaction log files for the affected mailbox store.
Above measures might help you in tackling 'Open MsgStore' error and would Exchange restore. If not, then use efficient Exchange Server recovery software to restore Exchange server file and to access the emails as normal before. Exchange restore tool scans the corrupt database and repairs the same efficiently and effectively. Other disaster like Exchange Server abnormally termination and inability of mounting the database on Exchange,etc. are all tackled with Exchange Restore tool.
Author of this article possess specialization in providing Exchange mail tips that include topics like restore Exchange, restore Exchange server, Exchange Server recovery, Exchange repair and many more. His articles enlighten the way to resolve various Exchange database issues.
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