When you try to mount the mailbox store or public folder store on an Exchange-based computer, you may receive the following error message:

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This issue occurs when your mailbox store or public store contains inconsistencies.

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To resolve this issue, try to restore the database from a backup (Method 1) if you can. This is the most reliable method if your backup is up-to-date and is usable. If no backup file is available, you might be able to repair the database (Method 2), but you must be aware that repairing a database can lead to irrecoverable data loss. Also, there may be situations where a database is so badly corrupted that it may not be repairable.

Important Microsoft does not recommend that you run a repaired database in a production environment. You must use Mailbox Merge (Exmerge) to merge the data from the repaired database into a new database as soon as possible after you discover that there are inconsistencies in the mailbox store or in the public store.

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Method 1

If you have a backup of the store that is inconsistent, you can restore from the backup file, and then mount the store.

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Method 2

Repair the information store:

1.	At a command prompt, change to the drive:\Program Files\Exchsrvr\Bin folder, where drive is the letter of the drive on which Exchange is installed. Use one of the following commands: • If you are trying to restore the mailbox store, type eseutil /p "drive:\Program Files\Exchsrvr\MDBDATA\priv1.edb", and then press ENTER. • If you are trying to restore the public folder store, type eseutil /p "drive:\Program Files\Exchsrvr\MDBDATA\pub1.edb", and then press ENTER.
2.	At the command prompt, type eseutil /mh "drive:\Program Files\Exchsrvr\MDBDATA\priv1.edb" (or pub1.edb), and then press ENTER to verify the consistency information that is returned.
3.	At the command prompt, type eseutil /d "drive:\Program Files\Exchsrvr\MDBDATA\priv1.edb" (or pub1.edb), and then press ENTER to defragment and to compact the database.
4.	At the command prompt, type ISINTEG -S Server_Name -FIX -TEST ALLTESTS, and then press ENTER. Repeat this several times until it reports zero fixes and zero errors.
5.	Mount the store.
6.	Back up the store.

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For additional information about the utilities that are described in this article, click the article numbers below to view the articles in the Microsoft Knowledge Base:

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