Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator at admin to inform them of the time this error occurred, and the actions you performed…

Hello, We are using a RDS Servers 2012R2 cluster with 4 Session hosts in a farm. Connecting internally with RDP to the farm is succesfull but externally with the Sophos SSL VPN it takes up to 3 times to connect successfully. The users are receiving…