Exchange Server 2013 Preview – HealthMailboxes

While taking a look at what information could be gleaned from the ‘Get-MailboxTrackingLog’ command in Exchange 2013 I ran into thousands of emails being sent back and forth between several  ‘HealthMailbox’es:


Tried to search for the mailbox in Exchange. Get-Mailbox shows no mailboxes**:

** After getting the account information from ADUC I was still not able to find user accounts using get-user PowerShell commands from the Exchange Server 2013 servers.
So I had to find the mailboxes in ADUC:

Information on the messages that are sent:

I cannot seem to find anything on these mailboxes or the background process, but I assume the subject line us supposed to help key us into it’s purpose:
“MBTSubmission/StoreDriverSubmission/00000032-0000-0000-0000-0000c7185756-MapiSubmitLAMProbe”
Anyone can decode the meaning of the ‘MapiSubmitLAMProbe’ word grouping?