Exchange 2010 (perhaps other versions as well)
Retain 3 and later
Exchange and EWS through IIS is not supported by GWAVA, anything mentioned in this article is provided as a courtesy. If you need help with IIS related issues please look up Microsoft knowledge base information or contact Mircrosoft.
The following are the default locations of the Exchange logs found on the applicable Exchange and IIS (EWS) servers:
Exchange logging: C:\Program Files\Microsoft\Exchange Server\V15\Logging
IIS logging (more useful): C:\inetpub\logs (for Exchange Web Services or "EWS")
Note: More information on EWS logs can be found here: http://social.technet.microsoft.com/forums/exchange/en-US/01dd7b22-35fe-4e8b-95c6-615ca7e25287/where-to-change-path-for-ewsprotocollogs