When you configure an Outlook 2013 account to use Cached Exchange Mode, Outlook 2013 works from a local copy of a user's Microsoft Exchange mailbox that is stored in an offline data file (file) on the user's computer, together with the Offline Address Book (OAB).The cached mailbox and OAB are updated periodically from the Exchange Server computer.
When an Outlook 2013 account is configured to use Cached Exchange Mode, there’s always a local copy of a user’s Exchange mailbox ready in an offline data file (file) on the user’s computer (by default in the C:\Users\App Data\Local\Microsoft\Outlook folder.) Whenever the user is offline and using Outlook 2013, the program works from this local copy and with the Offline Address Book (OAB).
The user can select Cached Exchange Mode or Online Mode during account setup or by changing the account settings.
You can also deploy one mode or the other by using the Office Customization Tool (OCT) or Group Policy. But we can point you in the right direction if you want to learn how to turn on Cached Exchange Mode in Outlook 2013 or change how much email to keep offline.
Microsoft is conducting an online survey to understand your opinion of the Technet Web site.
If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.