Event ID : 447

Issue : Outlook will not open for end-users. The information store terminated abnormally .

Event Source: ESE

Cause : This problem is frequently caused by a hardware failure or by antivirus scanning of the database file directory. Event ID 447 indicates that the logical database structure has become corrupted. This may occur for one or more of the following reasons:

1. Disk caching has not committed transactions to the hard disk and the server has stopped responding (crashed).
2. Incorrect log files were replayed during a database restoration.
3. The server has a defective hard disk controller.
4. Database log files have been removed that were not fully committed to the database.

E.g.
Information Store (nnnn) A bad page link (error -338) has been detected in a B-Tree (ObjectId: 70950, PgnoRoot: 157120) of database e:\Program Files\exchsrvr\mdbdata\priv1.edb (157120 => 296404, 296403).

Action Required :
If you receive these errors in your application log, it is best if you restore from an online backup as soon as you can.The restore must be performed by using a backup that was created before this error occurred. In a worst-case scenario where no good backup exists, you may have to do a hard repair by running the "eseutil.exe /p" command (original database is preserved). After the hard repair, do an offline defragmentation of the database by running the "eseutil /d" command, and then run the " isinteg -fix " command (Repair information store.) on the database.This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem.

Ref Link:

http://support.microsoft.com/kb/810190/en-us