Calendar preview in meeting requests When you view a meeting invitation, Outlook automatically displays your calendar alongside the body of the message.
When you have Cached Exchange Mode enabled, Outlook by will by default cache the main Global Address List as well.
This is called the Offline Address Book and is being generated on the Exchange server.
Due to various synching schedules, it can take up to 48 hours before you could actually see a change in Outlook after a modification has been made on the Exchange server or in Active Directory.
In this guide, the relevant timings are explained and instructions are given in how you can directly force an update and resync, which can be very handy when troubleshooting or when you work in an Exchange environment which sees a lot of user mailbox mutations.
How It Works: On a scheduled basis, Epicenter Server synchronizes a copy of the GAL to a contacts folder in each user's mailbox. During installation, you configure Epicenter Server by telling it which address book to distribute, who should receive the address book, and how often to send updates.