We recently added a new user which didn't show up in the Global Address Book for some users. Troubleshooting the issue showed that in house people with cached exchange mode were getting an Offline Address Book synchronization error. However remote users using RPC over HTTPS do not have the synchronization error and the new user shows up in the Global Address Book.
Under Client Access, Offline Address Book Distribution, the internal URL is
The external URL is https://mail.accucomci.com/OAB
Any ideas what I'm missing here?