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Update Exchange 2010 Offline Address Book

Sometimes you need to quickly update the offline address book. There are two steps:

1. To Update OAB:

Get-OfflineAddressbook | Update-OfflineAddressbook

2. Replicate OAB from mailbox server to all CAS servers:

Get-ClientAccessServer | Update-FileDistributionService

If you use OWA you can find updates right away. To update address book in Outlook (especially if it is in Cached Mode) you need to Download OAB manually (in Outlook goto Send/Receive menu, select Send/Receive Groups and press Download Address Book) or wait up to 24 hour for OAB replication.

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