Dealing with Junk Email is kind of like doing the dishes, it's dirty work but somebodies got to do it. While Spam filters are improving we know by the constant updates these filters require its an invisible war that's always going on. Also software being what it is, things don't always go to plan like this http://support.microsoft.com/kb/2885002/en-us So it can be good to check in on what's happening in your User's JunkEmail folders from time to time and EWS is great for doing this so. The following EWS script scans all the messages in the JunkEmail folder of a Mailbox (or Mailboxes) and looks at the SCL value of each of the Messages which is held in the PidTagContentFilterSpamConfidenceLevel property And also looks at the PidLidSpamOriginalFolder property which contains the original folder a Message was moved from, which only gets set when the Outlook Junk Email Filter takes an action on a message vs the Server Side action (where this properties doesn...
Pushing the Envelope in Messaging and Office 365 Development