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PowerShell: Get-Service ComputerName parameter binding bug

Please refer to the following examples. The ComputerName parameter (ValueFromPipelineByPropertyName) in combination with the "Name" or "DisplayName" parameters does not always scan the correct computers with the Get-Service cmdlet. Just in the first case, all target comptuers are queried. In the other cases, the first object is queried multiple times.

$Objects = [PSCustomObject] @{ ComputerName = 'LON-DC1' }, [PSCustomObject] @{ ComputerName = 'LON-CL1' }

SUCCESS: Works as expected, gets the service for each machine

$Objects | Get-Service -Name Netlogon | Format-Table MachineName, ServiceName, Status -AutoSize

MachineName ServiceName Status

LON-DC1 Netlogon Running
LON-CL1 Netlogon Running

ERROR: Uses the first comptuer name all queries

$Objects | Get-Service -Name * | Format-Table MachineName, ServiceName, Status -AutoSize

MachineName ServiceName Status

LON-DC1 ADWS Running
LON-DC1 AeLookupSvc Stopped
[...]
LON-DC1 wuauserv Stopped
LON-DC1 wudfsvc Stopped

ERROR: Uses the first comptuer name all queries

$Objects | Get-Service -DisplayName Netlogon | Format-Table MachineName, ServiceName, Status -AutoSize

MachineName ServiceName Status

LON-DC1 Netlogon Running
LON-DC1 Netlogon Running

ERROR: Uses the first comptuer name all queries

$Objects | Get-Service -DisplayName * | Format-Table MachineName, ServiceName, Status -AutoSize

MachineName ServiceName Status

LON-DC1 ADWS Running
LON-DC1 AeLookupSvc Stopped
[...]
LON-DC1 wuauserv Stopped
LON-DC1 wudfsvc Stopped

3 votes
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Claudio Spizzi shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →

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  • Sebastian N. commented  ·   ·  Flag as inappropriate

    I can confirm this.

    PS C:\WINDOWS\system32> (systeminfo.exe | select -First 2 -Skip 2) -replace ".+:\s+",""
    Microsoft Windows 10 Pro
    10.0.10586 Build 10586

    on

    PS C:\WINDOWS\system32> $PSVersionTable

    Name Value
    ---- -----
    CLRVersion 2.0.50727.8670
    BuildVersion 6.1.7600.16385
    PSVersion 2.0
    WSManStackVersion 2.0
    PSCompatibleVersions {1.0, 2.0}
    SerializationVersion 1.1.0.1
    PSRemotingProtocolVersion 2.1

    and

    PS C:\WINDOWS\system32> $PSVersionTable

    Name Value
    ---- -----
    PSVersion 5.0.10586.63
    PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
    BuildVersion 10.0.10586.63
    CLRVersion 4.0.30319.42000
    WSManStackVersion 3.0
    PSRemotingProtocolVersion 2.3
    SerializationVersion 1.1.0.1

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