[dba415]

Microsoft confirms CardDAV and CalDAV support are coming to Windows Phone | The Verge

says Microsoft will be supporting it, but what about for Windows Phone 7?

[Sam Sabri]

Nothing official until it comes from Microsoft...but I'm going to guess no. Mostly because going forward most handsets will come out with WP8, therefore they'll get that CalDAV/CardDAV support.

[trickym81]

I'd probably say no as well, but maybe Nokia will do something for WP7....

[HeyCori]

There have been hints at a 7.x update but nothing official.

Though I wonder if MS would have to update the entire OS or simply the mail application to add CD support.