AgendaX uses MAPI / Outlook MAPI to connect to the Exchange Servers. MAPI is a standard Microsoft protocol that uses RPC/MAPI connections to / from the Exchange Servers. When using Outlook MAPI, the RPC/MAPI packets may be encapsulated in HTTP packets, especially when reading Microsoft 365 mailbox calendars.
AgendaX uses standard TCP/IP connections to access SQL servers / SQL Express.