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You need to be assigned permissions before you can perform this procedure or procedures.
To see what permissions you need, see the "Recipient Provisioning Permissions" section in the Recipients Permissions topic.
To see what permissions you need, see the "Mailbox databases" entry in the Recipients Permissions topic.
When you assign an OAB to a mailbox, the default OAB and the OAB that's assigned to the mailbox database (if any) aren't used by the mailbox. Note: If the mailbox has an address book policy (ABP) assigned, and the ABP has an OAB defined, the OAB that’s directly assigned to the mailbox will take precedence over the ABP.
To change the OAB generation schedule, see Change the offline address book generation schedule in Exchange 2016.
For more information ABPs, see Address book policies in Exchange 2016.
This cmdlet is available only in on-premises Exchange Server 2016.
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.When you assign an OAB to a mailbox database, all mailboxes in the databases will use that OAB instead of the default OAB, unless the mailbox has an OAB assigned.