Outlook 2010–Storing all your emails in a local pst, and using exchange as your primary calendar
Chances are you have a finite space for emails, whereas there is almost limitless space on your pc to store your emails.
It is actually possible to store all your emails in a local pst, and keep things like your calendar and tasks on exchange so that you can sync your events.
To do so, first ensure that you close outlook. Then goto Control Panel –> Mail. Open the default profile.
Click on the email tab, and then click on the Change Folder" button.
Which will give you the following prompt.
Click Ok and then choose a local file to store the emails. Which will give you a screen similar to what you see below
Then, goto data files, and select your exchange profile and click on Set as Default