i am using exchange 2000 standard version the event viewer is getting filled up with the following Application log warning Event Type: Warning Event Source: ESE Event Category: (4) Event ID: 445 Date: 1/21/2004 Time: 11:20:33 AM User: N/A Computer: **** Description: Information Store (1944) The database D:\Program Files\Exchsrvr\mdbdata\priv1.edb has reached its maximum size of 16383 MB. If the database cannot be restarted, an offline defragmentation may be performed to reduce its size. For more information, click http://www.microsoft.com/contentredirect.asp. i ran the Offline defragmentation 2 months before and the performance was normal . But now, Users are experiencing slow outlook response. Do i need to run the offline Defragmentation again. I am planning to run it today. I would like to hear suggesstions from the experts here about Offline defragmentation. i will follow the steps described in the following link http://support.microsoft.com/default.aspx?scid=kb;en-us;828070 "After you run the eseutil /d command on your mailbox store, you must dismount all the stores in the storage group and remove any log files in the Mdbdata folder before you remount the database" Do i need to delete the LOG files in MDBDATA folder after running Offline defragmentation. Can't i leave log files untouched (log file corruption fear!!) Thanks in advance.