I recently did some house keeping in our OpsMgr environment, cleaning up old and unused Management Packs, and to easily identify potential unused Management Packs I of course turned to PowerShell!
This script can walk through the management packs and get the number of instances for each class. If there is no instances of a class it is very likely that it is not used. After running this script you will end up with a list of potential unused classes, you can now check each management pack for it’s content and see if there is other classes in it that is in use.
################################################################
# Author: Andreas Sobczyk, CloudMechanic.net
#
# Get Empty classes from Management Packs
################################################################
## Get all management packs starting with Contoso.
$MPs = Get-SCOMManagementPack -name Contoso*
## For each MP, For each Class, count classinstances.
$Overview = @()
Foreach($MP in $MPs){
$Classes = $mp.GetClasses()
foreach($Class in $Classes){
$ClassInstance = $null
$ClassInstance = Get-SCOMClassInstance -Class $class
## If you want you can change the number of class instances to sort on.
if($ClassInstance.Count -le 0){
$Overview += $Class
}
}
}
$Overview | Format-Table Name,Displayname,ManagementpackName
CloudMechanic.net 
Couldn’t get this to work on SCOM2016. Has the Get-SCClassInstance CMDlet been removed? I find no reference to it. Any ideas as this sounds like a useful script 🙂
Thank you.
The error:
Get-SCClassInstance : The term ‘Get-SCClassInstance’ is not recognized as the name of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At G:\xSCRIPTS\GetSCOMUnusedClasses_MPs.ps1:17 char:18
+ $ClassInstance = Get-SCClassInstance -Class $class
+ ~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (Get-SCClassInstance:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
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Hi Jonathan
I just tested in a 2016 setup and i get same error. I have update the script to use Get-SCOMClassInstance instead of Get-SCClassInstance this should work 🙂
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Awesome Andreas, thank you for looking into that so quickly! With the $Overview variable, I only ever see 2x columns DisplayName and Name. So the Format-Table only in-effect reverses the order of the 2x columns.
Not sure if that’s an error or expected, in which case maybe don’t need the ManagementpackName?
From:
DisplayName, Name
To:
Name, DisplayName
Would be cool for you to add a screnshot of the expected output to your post and markdown file, as an idea.
Thanks again!
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My mistake. Just running line 26 as:
$Overview | Format-Table
Shows there are more than 2 columns, including ManagementpackName.
Even with -Wrap and -Autosize I don’t see the output in the terminal window at least. But otherwise, it works 🙂
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Great info. What I am looking for is a way to list all HyperV network settings of a current running system – virtual switch, virtual NIC, Mac address, etc. Does anybody know of such a utility? Looking for similar utilities for SQL and Exchange, Windows networking, etc.? In summary a list of Windows settings so I can compare two systems that should be similar – same OS, same apps – to find out in fact if there are any significant differences between their settings in side by side comparison of settings relevant to the particular module/component so able to compare Exchange settings side by side.
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