On my Windows Phone, I can access Outlook.com and Gmail services just fine for email, calendar, and contacts.

On my Surface RT, I am unable to configure the calendar app to access my Gmail calendar at all. Email and contacts work fine.

On my OSX laptop, I am unable to configure the email, calendar, or contacts apps to access Outlook.com.

I'll obviously leave my Gmail email and contacts alone as they work on everything.

I'd really like a single calendar that I can access on all three devices though, as it's a pain having to use the web version on either the Surface RT or laptop depending on which calendar I choose.

Is there a simple solution to this?