Error: The server is not operational.


If you see the following error trying to do Active Directory LDAP queries using a secure connection (AuthenticationTypes.Secure):
 
Type : System.Runtime.InteropServices.COMException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Message : The server is not operational.
Source : System.DirectoryServices
ErrorCode : -2147016646
 
Check to make sure your domain certificate hasn’t expired.
 
You may also see the following event in System Event Log:
 
Event Type: Error
Event Source: Schannel
Event Category: None
Event ID: 36881
 
The certificate received from the remote server has expired. The SSL connection  request has failed. The attached data contains the server certificate.

 
MS has a KB article on this issue: http://support.microsoft.com/kb/839514

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Posted in Active Directory

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