Hi, Here's my problem: When in cached mode, I am unable to see new users/DLs in the global address book.
I know that it takes 24 hours or more to update the address book while in cached mode, but it's been almost a week now.
If you need multiple copies of the OAB in different locations (typically, in different Active Directory sites), verify that an organization mailbox is exists in the site, and enable shadow distribution for the OAB.
For more information, see Use the Exchange Management Shell to enable shadow distribution for offline address books.
This OAB is also the default OAB, which means it's the OAB that's used by mailboxes and mailbox databases that don't have an OAB assigned to them.