My organization uses Exchange Server 2010. I am using Mail (7.0) on OS X Mavericks (10.9).
After right-clicking a message in my inbox (or any other folder) and then selecting Archive, the message goes to the Archive folder that I created in my Exchange account. If I right-click the message again (already in the Archive folder), I can select Archive again. I did this, and the message disappeared.
It seems to have deleted the message and expunged it immediately, because I can not find the message in any other folder (or Trash, Junk, etc.) Can anyone confirm this behavior or explain what is actually happening when I perform the described actions?