Offline address book in exchange 2016 not updating

The OAB files are copied from the organization mailbox to for retrieval by clients.

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To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types ( If the Output Type field is blank, the cmdlet doesn't return data.An offline address book (OAB) is a local copy of an address list collection.The Identity parameter specifies the GUID, distinguished name (DN), or OAB name that represents a specific OAB.You can also include the path by using the format Server\Offline Address Book Name.Although this topic lists all parameters for the cmdlet, you may not have access to some parameters if they're not included in the permissions assigned to you.

To find the permissions required to run any cmdlet or parameter in your organization, see Find the permissions required to run any Exchange cmdlet (

To manually update an OAB, see Use the Exchange Management Shell to update offline address books.

The arbitration mailbox named is the first organization mailbox in your organization.

For information about the parameter sets in the Syntax section below, see Exchange cmdlet syntax (

You need to be assigned permissions before you can run this cmdlet.

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.