Check Your Mailbox Quota in OWA
STEP 1: To see how much of your mailbox quota you have used, open Internet Explorer on Windows and sign into Outlook Web Access (OWA) at https://mail.ttu.edu.
NOTE: It is not possible to check your mailbox space in Outlook Web Access using other Web browsers or operating systems.
STEP 2: In the navigation pane, click Mail.
STEP 3: Point to your name at the top of the Mail folder list using your mouse pointer. A window appears that shows the current size of your mailbox.
STEP 4: When you are nearing your quota, the following message will appear: