A useful command I’ve used from time to time to find out which users in Microsoft Exchange have the largest mailboxes.  By running the following command you can get an ordered list by physical mailbox size:

“Get-MailboxStatistics | Sort-Object TotalItemSize -Descending | ft DisplayName,@{label=”TotalItemSize(MB)”;expression={$_.TotalItemSize.Value.ToMB()}},ItemCount ”

All you need to do is run the command from the exchange shell.

It’s very useful to find users that really should be archiving their data.

Jay Greig