When running a Test-NetConnection, I can see port 5985 connects ok from server A to B.
And doing a Test-WsMan from desktop C to server B, it works.
However a Test-WsMan from server A to B, does not work.
All machines are on different subnets, both server firewalls indicate a domain connection. And it appears the windows firewall is not on.
The WsMan error indicates it's a networking issue (I've replaced the domain name with an example name).
Test-WSMan : <f:WSManFault xmlns:f="http://schemas.microsoft.com/wbem/wsman/1/wsmanfault" Code="2150859046"
Machine="1.example.org"><f:Message>WinRM cannot complete the operation. Verify that the specified
computer name is valid, that the computer is accessible over the network, and that a firewall exception for the WinRM
service is enabled and allows access from this computer. By default, the WinRM firewall exception for public profiles
limits access to remote computers within the same local subnet. </f:Message></f:WSManFault>
At line:1 char:1
Most articles help diagnose firewall issues, but this does not appear to be one if the tcp connection works. I'm not sure what diagnostic techniques to try next to understand what the error could be.