你好,
请先运行下面的指令,看看当前环境中的存在OAB有哪些:
Get-OfflineAddressBook |fl Name,VirtualDirectories,Guid,Server
然后,检查Microsoft Exchange System Attendant与Microsoft Exchange File Distribution 服务是否都正常运行,以及是否有与OAB相关的错误日志生成;
最后,尝试手动更新OAB:
EMC中手动更新:组织配置 --> mailbox --> Offline Address Book --> 找到正在使用的OAB --> 右击选择“Update”

使用EMS更新:
Update-OfflineAddressBook -Identity "GUID"
有关OAB的相关信息,建议你可以参考下面的博客:
How Offline Address Books Work in Exchange 2010
谢谢!
Niko Cheng
TechNet Community Support
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