This article describes database corruption and gives information and best practices from Microsoft on how corruption can be repaired by running the Eseutil and ISInteg utilities.
Some possible errors that have been related to corruption:
MAPI_E_CORRUPT_DATA
MAPI_E_BAD_VALUE
MAPI_E_FAILONEPROVIDER
MAPI_E_NOT_FOUND
Corruption can sometimes be repaired by running the Eseutil and ISInteg utilities on the information store. Eseutil repairs corrupt database pages in an offline database but discards any that can't be fixed. In repair mode, the Eseutil utility fixes individual tables but does not adjust the relationships between tables. The ISInteg utility is most often used after an Eseutil repair operation. It can also be used when an event or error warrants it. Several Microsoft Knowledge Base articles recommend the use of ISInteg for resolving specific issues.
ISInteg corrects database problems at the application level of the database. Eseutil corrects database problems at the ESE level. ISInteg understands the database as a collection of mailboxes and items in them, and can correlate and repair information and relationships between mailboxes, folders, items and attachments. if using Eseutil then Microsoft also recommends running ISInteg to check the logical relationships between tables.
Refer to the following Microsoft Knowledge Base article for more information on these utilities:
"Exchange Server Database Utility Guide" Eseutil http://technet.microsoft.com/en-us/library/aa996953.aspx
For more information about database recovery strategies, see http://technet.microsoft.com/en-us/library/aa998090.aspx .
For more information about common Eseutil errors, see http://technet.microsoft.com/en-us/library/bb123621.aspx .
For more information about the ISInteg utility, see the Microsoft Knowledge Base article 182081 "Description of the ISInteg utility"
http://go.microsoft.com/fwlink/?linkid=3052&kbid=182081
For more information about repairing Exchange databases and disaster recovery, see the Exchange Server 2003 Disaster Recovery Operations Guide http://go.microsoft.com/fwlink/?LinkId=47570
For more information about understanding Extensible Storage Engine (ESE) file types, see Extensible Storage Engine Files http://go.microsoft.com/fwlink/?LinkId=68167
If the corrupt messages cannot be fixed, they can be skipped by following the below solution:
https://support.quest.com/SUPPORT/index?page=solution&id=SOL45305
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