is there any alert printed to users session when this happens.. if yes is the alert from SA or from the vnc client? Also check access logs when this happens. ... View more

What error are you getting? Are you seeing traffic flowing via NC for that connection? You can check user access , event logs for further details. You may also run policy trace to check where exactly its stuck. To make sure RDP server is allowed on NC profile, check Resource policies -> Network Connect -> Network connect profiles ... View more