List all OU with Users

Question

I'm searching a way in PowerShell to list all OU with Users in it.

I tried something with Get-ADUser or Get-ADOrganizationalUnit but it doesn't really work.

Answer 1

Simply pull the OU from each user object. Then find unique values.

Get-ADUser -Filter * |
    ForEach-Object {$_.DistinguishedName -replace '(^.*?)(OU=.*)','$2'} |
    Sort-Object -Unique

Note: this makes the assumption that you are not storing user objects in Containers rather than OUs

Answer 2

One approach would be to get all of the OU's and check to see if they contain any users via -SearchBase . Filter them out with a Where-Object clause

Get-ADOrganizationalUnit -Filter * | 
    Where-Object {(Get-ADUser -SearchBase $_.DistinguishedName -Filter *).Count -gt 0} | 
    Select-Object -ExpandProperty DistinguishedName