EXCHANGE 2007 OUTLOOK ANYWHERE的问题

leeswift

exchange 2007部署
其中一台为CAS和HUB服务器，另外2台做了SCC
客户端无法通过外网设置，内网收发正常
通过https://www.testexchangeconnectivity.com/测试outlook anwhere，最后检测。
防火墙及注册表已经全部http://technet.microsoft.com/zh-cn/library/dd439392(EXCHG.80).aspx检查。
哪位老兄遇到过此类问题，请赐教。谢谢

	Attempting to ping RPC Endpoint 6001 (Exchange Information Store) on server jahwaex2007.jahwa.com.cn
	Failed to ping Endpoint
	Tell me more about this issue and how to resolve it
	Additional Details RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime

	Attempting to ping RPC Endpoint 6001 (Exchange Information Store) on server jahwaex2007.jahwa.com.cn
	Failed to ping Endpoint
	Tell me more about this issue and how to resolve it
	Additional Details RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime

Attempting to ping RPC Endpoint 6001 (Exchange Information Store) on server mailbox.XXX.com.cn
  Failed to ping Endpoint
   Tell me more about this issue and how to resolve it
   Additional Details
  RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime