Please describe the problem:
When marking messages on the Exchange Server as Junk (or if they are filtered automatically) they simply disappear.
Set this bug to critical as this might lead to data (mail) loss when marking  messages as junk accidently as there is no possibility to mark them as Not-Junk again.

Steps to reproduce:
1. Mark message on Exchange Server as Junk
   -> Message is moved "somewhere"
2. Try to mark message as Not-Junk


Actual results:
Message cannot be found in any folder

Expected results:
Message should be moved either to the local Junk folder or (preferred solution) to a configurable location (e.g. default Junk folder on Exchange server)

Does this happen every time?
Yes

Other information: