If you visit the /mmcaldav page on the meetingmaker server and login you will get the specific login instructions for your username.
Otherwise, use the generic:
- Servername: meetingmaker.server.com:443/mmcaldav/dav/users/user@servername
- Replace user and server names with appropriate names
- Username: username@servername
- Password: same as meetingmaker client password
- Server timeout on large calendars.