Process %1 (PID=%2). WCF request (%3) to the Microsoft Exchange Active Directory Topology service on server (%4) failed. ...

Process %1 (PID=%2). WCF request (%3) to the Microsoft Exchange Active Directory Topology service on server (%4) failed. Make sure that the service is running. In addition, make sure that the network ports that are used by Microsoft Exchange Active Directory Topology service are not blocked by a firewall. The WCF call was retried %5 time(s). Error Details 
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