Topic Last Modified: 2008-02-26

This topic provides information about how to troubleshoot the Exchange Management Console if is unable to connect to Active Directory with Event ID 40960.

If this error occurs, event log errors are generated with the following information:

Event ID: 40960

Event Source: LSASRV

Event Type: Warning

Description: The Security System detected an authentication error for the server ldap/WORKSTATION1.  The failure code from authentication protocol Kerberos was "There are currently no logon servers available to service the logon request."

This issue can be caused by the following:

Before You Begin

To perform this procedure, the account you use must be delegated membership in the local Administrators group. For more information about permissions, delegating roles, and the rights that are required to administer Microsoft Exchange 2007, see Permission Considerations.


To resolve the problem, do one or all of the following: