What is Cached Exchange Mode?
When Microsoft® Office Outlook® 2003 is configured for Cached Exchange Mode, the user enjoys a better online and offline messaging experience because a copy of the user’s mailbox is stored on the local computer. The guidelines and procedures in this topic will help make the process of configuring Outlook for Cached Exchange Mode go more smoothly. When an Outlook account is configured to use Cached Exchange Mode, Outlook works from a local copy of a user’s Exchange mailbox stored in an Offline Folder file (OST file) on the user’s computer, along with the Offline Address Book (OAB). The cached mailbox and OAB are updated periodically from the Exchange server. When a user starts Outlook for the first time with Cached Exchange Mode configured, Outlook creates a local copy of the user’s mailbox by creating an OST file (unless one already exists), synchronizing the OST with the user’s mailbox on the Exchange server, and creating an OAB. (If a user is already configured for offline use with a
