In Exchange, when searching through a number of mailboxes, you might encounter errors like "Memory Quota" or hitting the hard limit of 500mb within the PowerShell session.

In this script you will need a .CSV file with the alias names only and the it will search through each one with the progress bar within the Exchange Management Shell and give you a overall total of completion. If you check the statistics you will notice the count increase and once each mailbox has been completed then it will give a summary for that mailbox.