Getting a specific service recovery option for a list of servers - powershell

Question

Apologies in advance for errors. I'm still learning Powershell.
I'm trying to check a specific service recovery options for a list of servers in AD
$credential = Get-Credential
$servers = Get-ADComputer -Filter * -properties * | ?{$_.OperatingSystem -match "server"} | ft name -hidetableheaders | out-string
$Results = #()
foreach ($Server in $Servers)
{
Invoke-command -cn $server -credential $credential -ScriptBlock {Get-WMIObject win32_service |
Where-Object {$_.description -imatch "nscli" -and $_.startmode -eq "Auto"}; foreach ($service in $services){sc.exe qfailure $service.name}}
}
I'm getting the following error
Invoke-command : One or more computer names are not valid. If you are trying to pass a URI, use the -ConnectionUri parameter, or pass URI objects
instead of strings.
At line:1 char:32
+ foreach ($Server in $Servers) {Invoke-command -cn $server -credential $credentia ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (System.String[]:String[]) [Invoke-Command], ArgumentException
+ FullyQualifiedErrorId : PSSessionInvalidComputerName,Microsoft.PowerShell.Commands.InvokeCommandCommand
If I run the command directly on each server, I don't have any issues.
Invoke-command -cn EXCHANGE -credential $credential -ScriptBlock {$services = Get-WMIObject win32_service | Where-Object {$_.description -imatch "nscli" -and $_.startmode -eq "Auto"}; foreach ($service in $services){sc.exe qfailure $service.name}}
[SC] QueryServiceConfig2 SUCCESS
SERVICE_NAME: NSClientpp
RESET_PERIOD (in seconds) : 0
REBOOT_MESSAGE :
COMMAND_LINE :
FAILURE_ACTIONS : RESTART -- Delay = 120000 milliseconds.
RESTART -- Delay = 120000 milliseconds.
Because I'm using sc.exe, I'm unsure how to output the list into a csv format but at least, I can get some information of which servers the service failure restart aren't set accordingly
Thanks in advance
Cheers
G

Answer 1

Since Invoke-Command doesn't support the -WhatIf switch, your best bet is to echo the server name on console to see the server name that causes failure. In the debugging statement, the server name is enclosed withing single quotes ' for, say, extra whitespace is easier to see. Like so,
foreach ($Server in $Servers)
{
Write-host $("Now processing server '{0}' " -f $Server)
Invoke-command ...
}
You could also try to write the Invoke-Command statements to console and copy-paste those to another a Powershell session to see which, if any, is the failing one.
For what it is worth, you seem to use variables $Server and $server (note the upper/lowercase difference). Though variable names are not case sensitive in Powershell, you might have uninitialized variables caused by simple typos. To guard against such, use Set-StrictMode. It will cause Powershell to complain about uninitialized variables, which commonly are caused by mistyping variable names.

Answer 2

Got it working. Should have responded earlier. Thanks guys.
# Get the credential
$Credential=Get-Credential
# Collect the server list
$Servers = Get-ADComputer -Filter * -Properties operatingsystem | Where operatingsystem -match 'server'
$Results = #()
## Check service status
$Results = foreach ($Server in $Servers)
{Invoke-Command -ComputerName $Server.Name –Ea 0 -Credential $Credential {Get-Service |?{$_.DisplayName –match “nscli”} }}
## Create a csv report
$Results| Sort PSComputerName | select PSComputerName, DisplayName, Name, Status |Export-Csv nsclient_service.csv -NoTypeInformation -UseCulture
# Check the recovery options for NSclient service on each Server
foreach ($Server in $Servers)
{ write-host "Checking " $Server.Name;
Invoke-Command -ComputerName $Server.Name –Ea 0 -Credential $Credential `
{$services = Get-WMIObject win32_service | Where-Object {$_.name -imatch "nscli" -and $_.startmode -eq "Auto"}; `
foreach ($service in $services){sc.exe qfailure $service.name}}
}