Default offline address book not updating exchange 2016 xbox live slow no updating games
But changes to the OAB are not directly visible as the Offline Address Book is normally only updated once a day (at local time).Follow this KB article if you need the OAB to be updated directly, so you can start linking users in the Exchange (Online) Synchronizer.
Written by Support Info Bridge Overview: When you don't see all users in the Offline Address Book (OAB), then you might need to make some changes in the Offline Address Book.
In Outlook click on the Send/Receive tab, then Send/Receive Groups, and then click Download Address Book. In the Offline Address Book dialog box, click to clear the Download changes since last Send/Receive check box, and then click OK.
I worked on a case recently where one particular user was not appearing in the offline address book in an Exchange 2010 organization.
The best you can do with Office 365, is to wait until the next day after 5am, and then either restart outlook or force the OAB download using the below method.
Hardly ideal, but until Microsoft add this functionality this is the only option. https://office365.uservoice.com/forums/264636-general/suggestions/14919246-please-allow-admins-to-force-update-offline-addres To download the latest copy of the OAB manually, follow these steps: 1.