1. Open Outlook.
2. Right-click on your mailbox folder (it will read "Mailbox - " for example: Mailbox - Cougar, Joe).
3. Choose Properties or Data File Properties for Mailbox - .
4. Click on the Folder Size button.
5. The total size is what is used for everything you have on the Exchange server. It also lists the size of each individual folder below the total size.
The total size available per faculty, staff, and students is 4 gigabyte (4,000 megabytes).
Thank you for your feedback. Click Here to submit again.