The webpart is timing out when you try to open tool, the error is the application log. Any ideas?
The Service Principal Name (Delegation) configuration has been set incorrectly. Server connect URL: "net.tcp://servername:7046/DynamicsNAV71/Service". SPN Identity: "DynamicsNAV/servername:7046" The remote server did not satisfy the mutual authentication requirement.
This might be a DC issue, which server OS has been used in AD-DC? It should work with Windows Server 2008 R2. or Later.
I'm not sure, but I will find out from the customer. Thanks for the reply.