I created a new calendar using my CALDAV server information (including full path to the calendar). This works in Thunderbird/Lightening. (I also verified the paths by logging in using Epiphany going directly to the path.)
I create the calendar in Maya. However, I never get an error nor a prompt for a password. The calendar appears in the list of calendars but never syncs.
Update: I spent several hours on this and see that Maya automatically strips a port from the URL--for example, mycalendarurl.com:2080/calendars/ becomes mycalendarurl.com/calendars/ . I tried the URL less the port via a web browser and the missing port does not allow connection to the CALDAV server.