Exchange Event 12002 and Attachment Problems

Recently had a client that had an Exchange 2000 Enterprise Edition Information Store crash. Really the entire server crashed and we had to do a restore to get it going again. However the Information store was not backed up properly and had crashed. Once we got Windows 2000 Server up and running the Information Store wouldn't load.

So we ran the eseutil program with the -p to fix the Info Store. After that the Information Store did indeed load, however we were getting some weird problems and errors in the log. All of them dealt with attachments that the users tried to either open or forward or send in Outlook. Here's the Event 12002:

Event Type: Error
Event Source: MSExchangeIS
Event Category: Content Engine
Event ID: 12002
Date: 1/3/2006
Time: 10:57:09 PM
User: N/A Computer:
TCSCS_EXCH Description: Error 8004010F-80000000 occurred while processing message <> from 'System Administrator'.

Users were also getting "could not open one or more attachments" in Outlook or a "send error" when they tried to send an attachment.

Here's what we did to resolve it:
1. Run Isinteg -fix -test -alltests again to verify there is no error/warning. Note: Repeat the Isinteg command until the number of database fixes reaches 0 (zero) or does not change.
2. Offline defragment the database with eseutil /d.

Note: Online backup is needed after offline defragment.

After the defrag the Private store size went from 16GB to 3 GB. Pretty big jump.