Microsoft KB Archive/247770

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XADM: Directory Service Does Not Start After Error 1507 with Event ID 1002

Article ID: 247770

Article Last Modified on 9/27/2007


  • Microsoft Exchange Server 4.0 Standard Edition
  • Microsoft Exchange Server 5.0 Standard Edition
  • Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q247770


When you restart your computer after receiving an error message from Microsoft Exchange Server 5.5 and then try to start the Directory service (DS), Event Viewer records the following event:

Event ID: 1002
Source: MSExchangeDS
Type: Error
Category: Internal Processing
Description: The Microsoft Exchange Server database, EDB, could not be initialized and returned error -1507. Unrecoverable error. The directory cannot continue.


This behavior can occur when the Directory database (Dir.edb) structure is damaged.


To resolve this issue, restore the Directory database (Dir.edb) from a tape backup.

NOTE: If you do not have a valid backup of the Directory database (Dir.edb), you can restore the file through full disaster recovery of Exchange Server.


For more information about disaster preparedness and recovery, see the following articles in the Microsoft Knowledge Base:

184186 XADM: Recovering Exchange from a Corrupted Directory

183266 XADM: How to Restore an Offline Backup of the Directory Service and Information Store

177635 XADM: How to Set Up a Disaster Recovery Server for Dir.edb

The "Disaster and Recovery Planning" white paper discusses topics related to disaster recovery of an Exchange Server. This document contains useful information for anyone who administers an Exchange Server. You can find the white paper at:

Keywords: kbprb KB247770