Steps to take after running .mobileconfig on ios

I’m not an Apple user and have just had my first experience of trying to connect a remote user’s iPhone to caldav and carddav.

Having had the user run the .mobileconfig for their account it was not obvious what steps needed to be taken next.

I have not been able to find a How To so wanted to ask here?

Also, if additional calendars are added do these need setting up manually to appear in the calendar or is it automatic?