Dynamic DNS; providers

Hi! 

I just bought an AC1900 (R7000) router.
I need to configure DDNS, but I cannot find where to input the config for my provider (zoneedit).
I'm starting to wonder if the router only supports the 3 providers in the drop down list.

I find that hard to believe, seeing that this is not a cheap product.

Hope anyone can give me some pointers!

Tia!

Eivind