Hello,My Exchange server 2003 (SP2) is generating 9175 Event IDsCategory: MAPI sessionThe source: MSExchangeSADescription: "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 Information Store ID no: 8004011d-0512-00000000"The error keep repeating every minute.Any good recommendation to correct this issue?Thank you,

Hi, This can be cause by many issues: - disk space is low - the database reaches it's limit (Solution: Create D-Word with Name "Database Size Limit in GB" in [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<SERVER NAME>\Private-<GUID of the database>] and set the value to 75 (e.g. new size = 75GB) -System Attendant mailbox may not be mounted (KB 262456) - mapi32.dll is corrupt, copying this file from a working server on the server that has the issue resolves it. Please let me know if this solves your issue.

Hi, Before going on, I would like to confirm the following information. 1, Is the problem causing a work stoppage by preventing your user from sending or receiving email? 2, When did this issue first occur? 3, Please describe the exact issue that you encountered due to the error message. Please first check whether you deployed the Front-end server by taking into account the necessary requirements. http://support.microsoft.com/kb/822443/en-us Thanks Allen

i have mounted my mailboxes on my front end server and now the error not coming any more... thanks