I have several different clients on separate networks who today started having legitimate emails go to their junk mail folders in outlook. Even in some cases internal email. Has there been some sort of MS update causing this and can I do anything to change it back? I realize the users can go into the messages and hit 'Not junk' but I can't do this for hundreds of people on different companies. Is there something from a server or network standpoint I can do to undo this problem?