Kindly go through the following Microsoft reference:
Remote Desktop Services random timeout
Hello,
Since the deployment of our Remote Desktop Services infrastructure, we have been experiencing random timeouts when launching one of the RemoteApp portal applications and an abnormally long remote desktop connection on the server hosting the services: RD Connection Broker, RD Session Host, RD Licensing
No remote desktop problem on the second server hosting the services: RD Gateway, RD Web Access
Problem appears to be resolved by disabling Certificate Revocation List (CRL) checking on the Windows client
Is there a workaround other than changing the registry on all users?