You use the SSL VPN tunnel to upgrade the IP Office system from the service provider site. This feature is available when you upgrade a Release 8.1 system to a higher software version.
When you use Manager through the SSL VPN tunnel, automatic discovery of IP Office systems is not supported.
Perform this procedure at the service provider site, using the Manager interface installed on the service agent server. If you are configuring a Server Edition system, use IP Office Manager for Server Edition mode.