You aren't required to change any setting or restart Outlook.
Later that day, you use a modem for dial-up access to your Exchange account.
When the On Slow Connections Download Headers Only setting is selected, Outlook stops automatically downloading full items and also leaves attachments on the server.
For example, you may use a laptop computer at your office and connect via a network cable to your corporate local area network (LAN).
By default, 12 months of your email is available offline, but you can control how much mail is kept offline.
Top of page Shared folders include Exchange Public Folders, Share Point folders, or another person's Exchange folders when you’re using Delegate Access.
Cached Exchange Mode takes advantage of the ability of Outlook to automatically determine the speed of your connection to Exchange, and it optimizes data transmissions for that speed.By offering different levels of optimization, Outlook can adapt to changing connection environments, such as disconnecting from a corporate LAN, going offline, and then reestablishing a connection to the server via a slower dial-up connection.As your Exchange connection type changes — LAN, wireless, cellular, General Packet Radio Service (GPRS), and offline — transitions are seamless and never require you to change settings or restarting Outlook.By default, when Cached Exchange Mode is turned on, a local copy of shared folders is downloaded to your computer.To change whether shared folders or Public Folders are downloaded when Cached Exchange Mode is turned on, do the following: Cached Exchange Mode enables a better experience when you use an Exchange account.