Event id 2159 is coming now and then in the event viewer concerning a process called edgetransport failed to validate to a Exchange 2007 server. In the past there was a Exchange 2000 server connected to the network but not anymore. I think there is stil a connection to that server, but i cannot find where. And eventid 2159 is related to that. Thanks in advance for helping.

Hi Hans, Make sure that you have removed Exchange 2000 server properly from your environment. If it was last legacy Exchange server then you can follow below link How to Remove the Last Legacy Exchange Server from an Organization You can post all errorscoming in event log which help to identify the exact problem.