Possible Cause: Server disconnected desktop.
Possible Reason: This is not an error. The session disconnected because of the idle time limit policy applied through Workspot Control or the Group policies assigned to the virtual desktop. Please review the Workspot Control Timelimit policy under Policies tab or Group polices, if any:
Computer Configuration → Administrative Templates → Windows Components → Remote Desktop Services → Remote Desktop Session Host → Session Time Limits
User Configuration → Administrative Templates → Windows Components → Remote Desktop Services → Remote Desktop Session Host → Session Time Limits