##IIS日志:
IIS log (默认位置: C:\inetpub\logs\LogFiles\W3SVC1, 针对OWA, IIS, ActiveSync, EWS等客户端);
IIS记录的是HTTP的访问,比如OWA等。
##RPC Client Access Server 日志:
RPC client Access Log (默认位置: C:\Program Files\Microsoft\Exchange Server\V15\Logging\RPC Client Access,针对Outlook客户端)
##发送连接器和接收连接器日志:
C:\ProgramFiles\Microsoft\Exchange Server\V14\TransportRoles\Logs\ProtocolLog。
##参考
https://blog.51cto.com/andyboge/2125865
https://blog.51cto.com/net881004/2052694
https://blog.csdn.net/weixin_33722405/article/details/92306192
http://bbs.learnfuture.com/topic/461
https://social.technet.microsoft.com/Forums/officeocs/zh-CN/fd590a37-48cd-4667-be72-acbc75c65694/22914203093576024405exchange23458251433147135775383822044924687?forum=exchangeserverzhchs