Thanks to Indiana University Technical Services for posting the answer.
- You must be using Outlook Web Access (Premium). Yes, I said OWA, not the real deal.
- In the lower left of the window, on the navigation bar, click Mail to make sure you are in the correct view.
- In the upper left, you will see the folder list. Your name will be displayed near the top. Hover your mouse pointer over your name. A small box with your quota information will appear. (see image below).
If anybody knows how to find this in Outlook 2007 itself, please post a comment. I'm still shocked that this appears to be in OWA and not the real deal.
Class: Information Worker: Outlook 2007 Power User*
Date: November 6, 2008
Location: Indiana State University
*The Information Worker series is available through LanTech Training in Indianapolis. Please visit their website for more information