Hi Thomas,
Thanks for your question.
This can have to do with the firewall-settings, the following information will be needed by the system administrator to enter in the firewall:
Server-Addresses and IP-Addresses of Netviewer:
nv-projectplace-vms01.netviewer.com IP 82.98.68.84
nv-projectplace-vms02.netviewer.com IP 82.98.68.92
nv-projectplace-vms03.netviewer.com IP 62.146.40.120
Port 80 needed and Port 2000 recommended.
If the above doesn't fix your problem, I recommend that you contact our online meeting partner directly at support@netviewer.com as they could have more information about what's causing this.
Please let me know if your problems gets resolved.
All the best,
Karolina