The Exchange Management Shell fails to connect in Exchange 2013 environment, this is a DAG environment and previously it indicates another error message, which is in my another thread. We fixed that error by delete the retired proxy entry in the server registry, after that the error is gone but changed to below one, anyway the EMS still fails to connect to all servers:
VERBOSE: Connecting to NSWVIP999WTMBX.air.abc.au.
New-PSSession : [NSWVIP999WTMBX.air.abc.au] Connecting to remote server NSWVIP999WTMBX.air.abc.au failed with the
following error 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. For more information, see the about_Remote_Troubleshooting Help topic.
At line:1 char:1
+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Microsoft.Excha ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin
gTransportException
+ FullyQualifiedErrorId : WinRMOperationTimeout,PSSessionOpenFailed
Failed to connect to an Exchange server in the current site.
Enter the server FQDN where you want to connect.:
Then it just show can't connect to all the exchange servers, from the wording it seems pointing to the Windows firewall settings for winRM, but when I look at the windows firewall found it's turned off. We use Sophos enterprise for the security, but all other 3 exchange servers didn't have the same issue.