Yesterday i setup a policy using MRM to delete items from the deleted items folder (only). I tried this on one user and was successful (started the process manually) then i tried it on another user and this time set the policy to run over night from 12:00 am to 4:00 am.
It worked great! it deleted 40K items (all as expcted) except it looks like 20K + "read receipts" were sent by the exchange server to various internal and external users. Can anyone confirm that it supposed to work that way? if so how do i block the read recipts when the message has been deleted from the deleted items folder and when done so by MRM?