Use Cached Exchange Mode to work with items in your Microsoft Exchange Server mailbox even when your network connection is slow or unavailable.
4. Exit, and then restart Outlook.
Shared folders include Exchange Public Folders, SharePoint folders, or another person's Exchange folders when you’re using Delegate Access. 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:
1. Click File > Account Settings > Account Settings.
2. Click the Exchange account, and then click Change > More Settings.
3. On the Advanced tab, under Cached Exchange Mode Settings, check the options you want.
If the Cached Exchange Mode option is missing, one or more of the following might apply: