Get users in different AD trees with duplicate usernames and also report their e-mail?

I am trying to find a script that will query but the domain.local and sub.domain.local trees within the same forest and report users from both who have the same usernames, and also show what their Organizational Unit and e-mail address is

Is that possible, does anyone have a script

I have Quest ActiveRoles and both AD Powershell.

Or if there is another tool that does it even better

I have this but am not sure if there's a better way

$ForestUsers=[System.DirectoryServices.ActiveDirectory.Forest]::GetCurrentForest().domains| foreach{
$connection = Connect-QADService -Service $_.Name
Get-QADUser -SizeLimit 500 -Connection $connection | Select-Object Name,NTAccountName,Samaccountname,Mail
$ForestUsers | Group-Object Name | Where-Object {$_.Count -gt 1} | Foreach-Object {$_.Group}

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Aaron TomoskyDirector of Solutions ConsultingCommented:
Have you tried idfix from Microsoft? Also look at adtidy.

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