The system cannot resolve the Proxy Server address from DNS (Domain Name System).
Invalid Proxy Server address, the Proxy Server address could not be resolved.
For example:
Configure the Proxy Server address for domain.com.
The registration process could not find the IP address associated with the domain.com in the DNS server.
There is an easy and quick way to test the connection to your proxy server.
On the system, please go to Start and type the “Powershell” command.
On the PS prompt, please type in “Test-NetConnection [your proxy server] -port [your proxy server port]”
For example:
Test-NetConnection proxy.domain.com -port 8080
If your proxy server is accessible from the system the “TcpTestSucceeded : True” is displayed.
If your proxy server is not accessible from the system the “TcpTestSucceeded : False” is displayed.