You can set up Outlook to leave a copy on the server, allowing access to it through web mail, and set a time period for the server copies to be deleted after a set period of time (i.e. one week, 10 days). To check the space used by email acocunts, right-click on the “Mailbox – username” folder in the folder navigation pane and choose Properties. Click the Folder Size button and check the Total Size (including subfolders). This number should not exceed 250,000 KB.