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Article ID: 818479 - Last Review: December 29, 2014 - Revision: 3.4

This article has been archived. It is offered "as is" and will no longer be updated.

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986  ( ) Description of the Microsoft Windows Registry


By default, the Exchange System Manager administrative tool in Exchange Server 2003 signs and encrypts Lightweight Directory Access Protocol (LDAP) traffic. The signing and sealing of LDAP traffic helps to secure LDAP traffic over the network. Exchange System Manager compares the data that is received with the data that is sent to help verify data integrity and tries to confirm that the packaged data comes from a known source and that it has not been tampered with.


To turn off the signature and encryption of LDAP traffic in Exchange Server 2003, create the DebugLDAP value in the following registry key and set the value to 1:
To do this, follow these steps.WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
  1. Click Start, and then click Run.
  2. In the Open box, type regedit, and then click OK.
  3. Locate, and then click the following registry key:
  4. On the Edit menu, point to New, and then click DWORD Value.
  5. Type DebugLDAP, and then press ENTER.
  6. On the Edit menu, click Modify.
  7. In the Value data box, type 1, and then click OK.
  8. Quit Registry Editor.

  • Microsoft Exchange Server 2003 Enterprise Edition
  • Microsoft Exchange Server 2003 Standard Edition
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