Win 10 Calendar CalDav?

[vp710]

Hey guys, so I downloaded the Win 10 Insider Preview. I was checking out the Calendar application and I can't find any way to add a CalDav account. It seems, Gmail, iCloud, ActiveSync, Exchange and others are supported but unless your CalDav account is associated with an email address, it seems there's no way to add anything.

I have a CalDav server (through Radicale portable: Radicale Portable - A Simple Calendar Server | PortableApps.com - Portable software for USB, portable and cloud drives) and the only way to add it would be to enter the server address directly, username and password.

So am I missing something or has it been overlooked again? That'd be very disappointing. :/