Get-Help Add-Computer Reveals help for Select-XML

[teskemj]

Steps to reproduce

get-help add-computer
get-help add-computer -examples

Expected behavior

Help output for add-computer
Examples for add-computer

Actual behavior

Updates help each time and returns select-xml help
Examples for select-xml

Environment data

Name                           Value
----                           -----
PSVersion                      7.0.0
PSEdition                      Core
GitCommitId                    7.0.0
OS                             Microsoft Windows 10.0.18363
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

[MaximoTrinidad]

It seems there is a conflict between core modules: PS7 vs. Windows PowerShell

PS C:\Users\max_t> Get-Module -L Microsoft.PowerShell.Management                                                                                                                                                                                                                                                                                                            Directory: C:\program files\powershell\7\Modules                                                                                                                                                                                            ModuleType Version    PreRelease Name                                PSEdition ExportedCommands                         ---------- -------    ---------- ----                                --------- ----------------                         Manifest   7.0.0.0               Microsoft.PowerShell.Management     Core      {Add-Content, Clear-Content, Get-Clipbo…                                                                                                                             Directory: C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules                                                                                                                                                                               ModuleType Version    PreRelease Name                                PSEdition ExportedCommands                         ---------- -------    ---------- ----                                --------- ----------------                         Manifest   3.1.0.0               Microsoft.PowerShell.Management     Core,Desk {Add-Content, Clear-Content, Clear-Item…                                                                                                                         PS C:\Users\max_t> 

It can't find it the Add-Computer help files and is returning something else. And, it doesn't even work if you use the following command:

Import-Module Microsoft.PowerShell.Management -UseWindowsPowerShell                                                                                                             

Something is going on! :)

[teskemj]

Cool...I was just poking around between Windows Powershell and 7 as I'm onboarding systems and wanted to test out 7.

[doctordns]

I am using PowerShell 7.0 as released in Windows 10. This fails here too.

[teskemj]

The command executes, but look at the help. It displays the help for select-XML :)

[MaximoTrinidad]

@doctordns

This happens to me in the beginning, then I realized that the help for Add-Computer is not equal to the Select-XML help. Unless I'm missing something.

In my case, I got PowerShell 7 install in of my environments (Physical and VM's) and the Add-Computer cmdlet is not available at first. You said that works! Hum!

I wonder! How did you install PowerShell 7? I use the "PowerShell-7.0.0-win-x64.msi". :)

[doctordns]

Installed using the MIS via Install-PowerShell7,ps1 script on github. Have you tried Update-Help??

[doctordns]

OK - so I tried this on a newly created DC:

ANd if I update the help , the examples reutrn

NO Idea why the earlier command worked like that!!!

[MaximoTrinidad]

@doctordns

Yes! It works in Windows PowerShell but not in PowerShell 7.0.

It's possible there's a conflict of modules that the Get-Help can't resolve.

:)

[SteveL-MSFT]

I believe this is a side effect of https://github.com/PowerShell/PowerShell/issues/11419. Going through the code, Get-Help initiates command discovery and finds this command in the Windows PowerShell Management module, so uses that index into the PS7 Management module help which shows the wrong content.

[anmenaga]

Can somebody with the repro please try it on the latest daily build? Thank you.

To install the latest daily build: Invoke-Expression "& { $(Invoke-RestMethod 'https://aka.ms/install-powershell.ps1') } -daily"

PS C:\> $psversiontable.PSVersion

Major  Minor  Patch  PreReleaseLabel BuildLabel
-----  -----  -----  --------------- ----------
7      0      0      daily.20200322

PS C:\> get-help add-computer

NAME
    Add-Computer

SYNTAX
    Add-Computer [-DomainName] <string> -Credential <pscredential> [-ComputerName
    <string[]>] [-LocalCredential <pscredential>] [-UnjoinDomainCredential

[MaximoTrinidad]

@anmenaga

At least I'm not getting the Help Select-Xml now.

[MaximoTrinidad]

@anmenaga

Ah! No luck!

I just did an Update-Help -Force and the issue came back. Sorry!

[joeyaiello]

Just did a little investigation: it looks like this is a symptom of the fact that you can't run Add-Computer from 7.x due to it existing in the system32/WinPS instance of MS.PS.Management. @anmenaga kinda fixed this where "first one wins" with cmdlets like ConvertFrom-String in MS.PS.Utility, but I suspect that because MS.PS.Mgmt is being loaded at startup time, you can never load the one system32 one that has Add-Computer.

@teskemj (or anyone else in the thread): are you able to actually run Add-Computer at all from 7.x? I cannot, hence my conclusion above.

If that's the case, we should rename this to "Add-Computer won't run from WinPS Microsoft.PowerShell.Management"

[MaximoTrinidad]

This might answer your question.

Definitely it should be tagged! This cmdlet won't work in PS7.

[joeyaiello]

I verified that this is working now in 7.1.0. If it's still failing for you on 7.1 or newer, please file a new issue.