Remove old/redundant activesync partnerships - powershell

Question

I have used a script to get all users that have activesync enabled and list all of the connections. Many users have multiple entries where they have used a phone and upgraded, or re-enabled after a wipe.
I am looking to get rid of any entry above 30 days, only for users in a specific OU, or text file full of users.
I believe this code will work universally across the domain:
$DevicesToRemove = Get-ActiveSyncDevice -result unlimited | Get-ActiveSyncDeviceStatistics | where {$_.LastSuccessSync -le (Get-Date).AddDays("-30")}
$DevicesToRemove | foreach-object {Remove-ActiveSyncDevice ([string]$_.Guid) -confirm:$false}
but I only want to do it for either an OU, or txt list.
I can create a .txt list of either the UPN, or the username, which may be easier than looking for all users in an OU. How would I modify that code (or altogether better code?) to remove 30 day+ activesync connections for that txt list?
Text file option would be preferred for a better target.

Answer 1

I think I self answered, so posting for others.
“==============================================================”
“Start Mailbox Retrieve”
“==============================================================”
$mbx = get-casmailbox -resultsize unlimited | where {$_.activesyncenabled -eq $true} ;
“==============================================================”
“End Mailbox Retrieve”
“==============================================================”
$mbx | foreach {
“Processing: “+$_.name
$name = $_.name;
$device = get-activesyncdevicestatistics -mailbox $_.identity | where {$_.LastSuccessSync -le (Get-Date).AddDays(“-30”)};
if($device){
{
”
Device: “+$dev.DeviceType
$csvRows += $dev
}
}
}
“==============================================================”
“Start CSV Write”
“==============================================================”
$csvRows | Export-Csv “c:\ps\staledevices.csv” -NoType
“==============================================================”
“End CSV Write”
“==============================================================”
From http://techtalklive.org/ttlblog/removing-stale-activesync-devices/
Then to remove:
Import-Csv c:\ps\staledevices.csv |foreach {remove-activesyncdevice -identity $_.guid -confirm:$false}
From http://techtalklive.org/ttlblog/removing-stale-activesync-devices/