When we connect to import-export service to perform export / import even for one component, the process fails and the error that is logged in the event viewer is: The server cannot handle directory requests.
Component: LdapAuthenticationHttpModule Errorcode: 0 User: NT AUTHORITY\NETWORK SERVICE
StackTrace Information Details: at System.DirectoryServices.Protocols.ErrorChecking.CheckAndSetLdapError(Int32 error) at System.DirectoryServices.Protocols.LdapSessionOptions.FastConcurrentBind() at Tridion.Security.DirectoryService.GetLdapAutenticationConnection(Boolean forceStandardBind) at Tridion.Security.DirectoryService.AuthenticateUser(String userName, String password) at Tridion.Security.Web.LdapAuthenticationHttpModule.OnAuthenticateRequest(Object sender, EventArgs e)
We have 6 CM servers out of which we are seeing above error only for content porter and webdav in 3 CM servers and other 3 CM servers are working fine.
If we access the CME, it works fine with Ldap authentication.
We compared those working vs non-working servers however did not find any difference. Also ErrorCode is 0 for LdapAuthenticationModule which indicates success so I am not sure what could be the issue.
Has anybody faced similar issue? or If you have any pointers on things to look for then please share.
Any help is appreciated?
Update 1: We found one thing, the error for Ldap is happening for only few users including MTS user and not all users.