PSSESSION issues with powershell. Wierd result

Question

Hi
I have a problem, the problem is that I am running a PowerShell script:
$server
= get-ADComputer -Filter 'Name -like "serv*"' | select name
$server
| ForEach-Object { Enter-PSSession -ComputerName $_.name import-module servermanager add-WindowsFeature XPS-Viewer Exit-PSSession }
And I'm getting the result of:
Success Restart Needed Exit Code Feature Result
True No NoChan... {} (that's because I have run it several times) but the initial was "true" "no" and "successful"
when I run get-windowsfeature xps-viewer, I get this:
Display Name Name
[X] XPS Viewer XPS-Viewer
That means that xps is installed, BUT IT IS NOT INSTALLED!!!
If I run pssession directly to the server(in powershell window)(001->) it works! see further:
"PS C:\Windows\system32> enter-pssession -computername server071"
[server071]: PS C:\Users\4x\Documents> import-module servermanager
[server071]: PS C:\Users\4x\Documents> get-windowsfeature xps-viewer
Display Name Name
[ ] XPS Viewer XPS-Viewer
Its not installed!!
now I run from powershell:
[server071]: PS C:\Users\4x\Documents> add-windowsfeature xps-viewer
Success Restart Needed Exit Code Feature Result
True No Success {XPS Viewer}
WHAT AM I DOING WRONG? It seems hopeless, I have about 500+ servers, and doing this manual is not an option! I have done variations, like just using 1 server name, but the result is the same. no installation, but the result says "ok, done" no error, BUT IT HAS NOT INSTALLED!!
Please I need some advice here... HELP!!!!
PS: Running from POWERGUI in ADMIN mode..
JFB

Answer 1

Enter-PSSession is for interactive session.....if you want a scriptblock to be executed on a remote mcahine use Invoke-Command:
$server= get-ADComputer -Filter 'Name -like "serv*"' | select name
$server | ForEach-Object { Invoke-Command -ComputerName $_.name -scriptblock {import-module servermanager;add-WindowsFeature XPS-Viewer }
EDIT-- Oops looks like it's already answered
Hope this helps
Knowledge is Power{Shell}.