About Application Protocols, Authenticated Connections, and Domain Controllers : Viewing MAPI connections
  
Viewing MAPI connections
MAPI connections appear in the Current Connections report using these labels:
• MAPI-OA for Outlook Anywhere connections
• eMAPI-OA for encrypted MAPI connectioins. Encrypted Outlook Anywhere connections appear in the system log with an RPCH prefix.
• MAPI-HTTP for MAPI over HTTP connections.
About MAPI
Viewing the Current Connection report