Below are two possible ways for calculating the size of a user mailbox:
To get an overview of individual mailboxes, the size of messages, archive, shortcuts, etc. switch to the Archive size view on the left pane.
On the Mailboxes tab, check the mailboxes for which you want to generate the statistics and click Run.
If you check the Include Exchange size check box, the report will contain a new column: current size of the mailbox on Exchange. This helps you to report the size of the mailbox after archiving.
The statistical data for the chosen mailboxes will be represented in the form of a graph and on the Data tab as a statistics table. Colors in the graph represent the following:
red the size of all messages of the given mailbox
green the size of the mailbox in the HSM store, i.e. archive size
yellow the shortcut size, i.e. the size of shortcuts left in the Exchange server
From time to time, administrators may need to know the status of user mailboxes to get an overview of the entire size of mailboxes in the HSM store. For that purpose, they may easily create reports containing all relevant data.
When clicking on the Archive size report tab for the first time, there will be no mailboxes displayed. To display all mailboxes, click on the Calculate button.
The list of mailboxes will be displayed on the right pane, including message size, archived size, archived size uncompressed, shortcut size, and the limit of mailboxes as well.
Mailboxes can be sorted by simply clicking on the respective column headers (Object, Message size, Archive size, Archive size uncompressed, Shortcut size, and Limit). The size of delayed shortcuts is not calculated in the Shortcut size column
To get an overview, create a report by clicking on the Export button.
The Export Wizard window will open with three options to choose from: All mailboxes, Filtered mailboxes, or Distribution lists with members, depending on whether you want to create a report including all the mailboxes, only filtered mailboxes or distribution lists with members only.