Microsoft KB Archive/255791

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Article ID: 255791

Article Last Modified on 10/27/2006


  • Microsoft Exchange Server 5.5 Service Pack 3

This article was previously published under Q255791


The Server Selection tab for the Mailbox Manager utility may not list the available servers in the site. Under Servers, the following is displayed:

LDAP: Inappropriate Authentication.

Mailbox Manager also processes mailboxes on the local server, but does not scan mailboxes that are located on other servers.


This issue can occur if Microsoft Windows NT Challenge/Response has been removed as a form of authentication from the Lightweight Directory Access Protocol (LDAP).


To resolve this issue, when you need to modify the Server Selection tab, make sure that Windows NT Challenge/Response authentication is enabled for LDAP on the Authentication tab.


For additional information about Mailbox Manager and LDAP authentication, click the article number below to view the article in the Microsoft Knowledge Base:

239065 XADM: LDAP Authentication Method Is Not Supported Error Message When Configuring Mailbox Manager

Keywords: kbprb KB255791