How to change the Cached Exchange Mode connection setting

In Outlook, click File | Cached Exchange Mode.
1.	Select one of the following:
		Download Full Items Outlook downloads the header, body, and attachments of e-mail items at the same time. Use this option when you have a fast network connection with the Exchange server
		Download Headers and then Full Items Outlook downloads all the headers first and then the complete items, including attachments. Use this setting to quickly see all the item headers. When you click a header, the full item is downloaded immediately.
		Download Headers Outlook downloads the headers only. The full item, including attachments, is available on demand when you preview or open the item. Use this setting when you want the amount of data that is transferred to be as small as possible.
2.	If you would like Outlook to download both headers and full items even when a slow connection is detected, untick On Slow Connections Download Only Headers.