Don't normally troll through my archived messages, but was browsing today. There's a bunch of messages from the Exchange Health Mailboxes being archived that have a subject line of "client submission probe". I looked those up and they are health check messages that Exchange server is sending as a check.
Made me wonder, anyone else seeing these? My journaling is setup at the database level, so, is there some way of filtering these out? Don't see a reason to have them go to the archiver. Transport rule on Exchange? ???