Query Exchange Mailbox
Use the Task Query Exchange Mailbox to obtain an overview of the number of mailboxes, their total size, and the number of Exchange servers in a specific domain. For example, perform this Task at set intervals to monitor the total growth of mailboxes in your environment. Click through the results to see detailed information per user, mailbox, server, etc.
This Task does not necessarily need to be performed on an Exchange Server: any Agent that meets the prerequisites can perform the Task.
Use the filters to drill down to more specific information, for example to view how many mailboxes a specific OU has, and what size they add up to.