如果希望通过ADSI 强行删除，可以考虑如下方法：
Open ADSI-Edit and got to configuration
Navigate to this path:
CN=Configuration,DC=DOMAIN,DC=LOCAL
CN=Services
CN=Microsoft Exchange
CN=EXCHANGE_ORG
CN=Administrative Groups
CN=CN=Exchange Administrative Group (FYDIBOHF23SPDLT)
CN=Databases
CN=Public Folder Database XYZ
参考微软链接如下：
http://social.technet.microsoft.com/Forums/systemcenter/zh-CN/2d1aaaf7-d217-45d3-8a82-9bf1a56ff82b/exchange-server-2010
