Check how much space I have used on Hosted Exchange through Outlook

The following article explains how to check your mailbox size for exchange through Outlook.

1. Right-click Mailbox - <username> in your Mail or Folder List view
2. Select Properties for "Mailbox - <username>"…

   

3. Click the Folder Size… button

   

4. You will see 2 tabs, Local Data showing the space used on your computer, and Server Data showing the space used on the server.