To see what permissions you need, see the "Offline address books" entry in the Email address and address book permissions topic.By default in Exchange Online, the Address List role isn’t assigned to any role groups.
Even though Outlook is the last in the chain, it is often the first level where the troubleshooting takes place as usually this is where the request is coming from.
Complete a brief survey to get a complimentary 70-page whitepaper featuring the best methods and solutions for your virtual environment, as well as hypervisor-specific management advice from Tech Target experts.
I might have a problem with my Offline Address Book in Outlook.
An offline address book (OAB) is a local copy of an address list collection.
OABs are used for address book queries by Outlook clients that are configured in cached Exchange mode.