Outlook cached mode global address list not updating
My computer slows down when Outlook shows the "Updating Address Book" status. In computers with slow hard disk drives, such as portable computers, or running Outlook in a Virtual machine, the process of updating the address book can slow down the computer if the hard disk is fragmented.To improve offline address book download performance, try defragmenting your hard disk.
When you have Cached Exchange Mode enabled, Outlook by will by default cache the main Global Address List as well.
(This could take several minutes) Step 2: Uncheck the box next to Download changes since last Send/Receive.
(This could take several minutes) Outlook shows the "Updating Address Book" status for a long time. Outlook has a throttling feature that slows the address book update when you are working in Outlook.
In this dialog box, you can specify either No Details or Full Details.
These settings affect the offline address book download.
After completing these steps, you can reopen Outlook, make sure that it is not in Offline mode, and search for an email address to confirm that it is now referencing the most current global address book.