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Exchange 2003 Corrupt Mailboxes

Posted on 2010-09-01
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Last Modified: 2012-05-10
Hi everyone,

1st off: what's it mean for a mailbox to be "corrupt" in Exchange?

2nd, how can I repair corrupt mailboxes? Is there a way to do this without dismounting the database?

Thanks!
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Question by:Pugglewuggle
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by:Shabarinath Ramadasan
ID: 33583802
If any of the pages representing a mailbox  in an exchange database gets corrupted, we say that a mailbox is corrupted.

If its a major corruption, you wont be able to mount the Database.
At the time of mounting this DB, you may receive this error

“The database files in this storage are inconsistent

Id no: c1041739”

In few cases, we may see that database gets mounted but few user mailboxes wont be accessible.

If you are able to mount it, try moving the mailboxes to a different DB and delete the DB.
If DB is not mounting, then you may think of using ESEUTIL or restoring from a previous backup.

Good luck
Shaba
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Shabarinath Ramadasan earned 500 total points
ID: 33583812
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by:jawad1481
ID: 33583956
Hello,
Mailbox Corruption :
According to me it is condition where the Users starts noticing some strange behaviour on the outlook client, OWA or mobile devices. Users may experience issue where they will see missing emails in outlook , but in OWA it will be present.
YOu will see some missing calendar appointments in mobile device, but the same appointments will be present in OWA and outlook.
In the outlook client you will not be able to read Emails.
Such Behaviour is termed as mailbox corruption. we dont have any specific error or evnt id's related mailbox corruption. we comes to know after isolating the issues.

how to fix the mailbox Corruption : There are ways to fix it.
1) If you are using Standard edition of exchange server then we can mount the Database into Recovery Storage Group (RSG). Merge the mailboxes from RSG to production.  
when we mount the Corrupted database to RSG, we mount the production with Blank new database.
In order to do this you will have to dismount the database for some time.  Merging the mailboxes from RSG to Production will break all the client rules, and also the single instance storage (SIS).

Using Recovery Storage Group in Exchange 2007
http://www.petri.co.il/using_rsg_in_exchange_2007.htm 

Restoring Exchange Mailbox Data Using the Recovery Storage Group, Part 2
http://www.petri.co.il/restoring_exchange_mailbox_recovery_storage_group_part2.htm

2) If you are using Enterprise edition then we can perform move mailbox from one store to another Store.

3) we can also run a command called as ISINTEG. But for This you will have to dismount the database and run the command "isinteg -s servername -fix -test allrests" , select the option i.e. Numbers from list and hit enter.
perform the same comand thrice.

Let me know if you have any concerns.

Regards,
:)






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Expert Comment

by:Postmaster
ID: 33583982
If the issue affects only one user, then check if that user has a damaged OST file.
Cached mode replicates the mailbox in an OST file, Non-Cached mode replicates just the calendar in an OST file.

If the user can logon to a different PC and work, then locate and remove the damaged OST file from that users machine.

Exchange can fix database damage on read, but does not fix the problem. This can be fixed by forcing a write of mailbox data. The normal method for this is to move the mailbox to another database.

If all this fails - then go to your backup.
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