Great idea for a script.
I suspect your problem comes from this line
$combineddup = $combinedreport|Group-Object Mac |where {$_.Group -gt 1}
which should according to me be
$combineddup = $combinedreport|Group-Object Mac |where {$_.Group.Count -gt 1}
I attached a reviewed version of the script with a couple of other changes I would like to suggest. Have a look.
Feel free to ask if some of my proposed changes are not clear.
On the puppies, you're excused for the first 10 scripts you post in this community Image may be NSFW.
Clik here to view.
