I've been trying to write a short Powershell script to check for orphaned home drives and found that it was returning way too many results.

The basic syntax is

import-module ActiveDirectory

$path = "\\path\"
$file = New-Item -type file "C:\unusedhome.txt"
$homedrives = Get-ChildItem $path

ForEach($folder in $homedrives){
$name = $path + $folder.name
$user = Get-ADUser -Filter { HomeDirectory -eq $name }

if($user -eq $null){
add-content $file $name
}
 
$user = $null
}

It appears that every account with a samaccountname starting with 0 through 9 and A through F returns null, whereas everything account with a samaccountname starting with G through Z returns a result (where it should).

The weirdest thing is that even if I use something like

$user = Get-ADUser "bob" -Properties HomeDirectory
Get-ADUser -Filter { HomeDirectory -eq $user.homedirectory }

Where "bob" is a user with a homedirectory set, it still returns null, even though $user.homedirectory contains the correct homedirectory value as read out of the user account .

Any ideas?