a. Change Cache Mode Setting

· Start Outlook

· Click Account Settings on the File tab, and then click Account Settings

· In the Account Settings dialog box, double-click your Microsoft Exchange account on the E-mail tab

· In the Change Account dialog box, drag the Mail to keep offline: slider to the desired number of months

· Click Next

· Click OK when advised you have to restart Outlook to complete the configuration change

· Click Finish

· Restart Outlook