How to view Whitespace in Exchange 2010 Databases

With older versions of Exchange admins would use the 1221 EventID to see how much whitespace was available in each database.

With Exchange 2010 EventID 1221 is no longer used.

Admins now can query the database directly with the following PowerShell command to see the whitespace in each Database

Get-MailboxDatabase -Status | FT Name, AvailableNewMailboxSpace