Microsoft has provided a nice easy command to show you how large your current databases are,  this one line command can be pipped to a file or used in a report Get-MailboxDatabase -Status | fl name,databasesizes Name         : DB001 DatabaseSize : 141.8 GB (152,220,270,592 bytes)  Name         : DB002 DatabaseSize : 98.17 GB (105,412,362,240 bytes)