Found a solution on technet
If the issue occurs on certain one, delete the local OAB file and manually download it again to check the result. Otherwise, please refer to the following steps.
Please remove C:\Program files\Microsoft\Exchange Server\ExchangeOAB and C:\Program files\Microsoft\Exchange Server\Client Access\OAB to delete the subfolder. And
1. Open EMC->Organization Configuration->Mailbox
2. Under Offline Address Book tab, right click the Default Offline Address Book and click Update
3. Then, please check whether the following share folder is created on the OAB generate mailbox server:
C:\Program files\Microsoft\Exchange Server\ExchangeOAB
4. If the OAB file is generated, please restart the “Microsoft Exchange File Distribution” service on the Client Access Server and then check whether the OAB file has been replicated to the C:\Program files\Microsoft\Exchange Server\Client Access\OAB on the Client Access Server.
5.If the OAB file has been replicated to the Microsoft\Exchange Server\Client Access\OAB, then check this issue.
