Get a list of all users that have a target address of a specific domain

Scenario:  You wish to see how many remote mailboxes have the correct email domain configured for their remote routing address (TargetAddress).  You want to perform a AD PowerShell query for speed.

Scriptlet:

Get-ADuser -filter {TargetAddress -like “*.mail.onmicrosoft.com”} | Select Name, TargetAddress

OR you just want a count:

(Get-ADuser -filter {TargetAddress -like “*.mail.onmicrosoft.com”} | Select Name, TargetAddress).count