The Outlook 2010 Technical Preview edition brings a very nice feature for the users, to find out how big their mailbox is and what the maximum size allowed is. In order to find the information, click on the “Office Button” which is next to the “Home” tab.
It brings up the “Account Information” window and in the “Mailbox Cleanup” section, it shows the mailbox usage, something that we are used to in Gmail. It really helps the users to keep their mailbox within limits.
The Cleanup Tools provide user with links to archive, empty “deleted items” folder and run mailbox cleanup wizard.