Yes, the Universal websites cowriter.com snapandread.com and the extensions all have integration with Microsoft's OpenID API.
We currently support Microsoft Live and Office 365 user ID's.
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When logging in or creating an account, enter your user id "email address" then click continue. You will be prompted with the "Microsoft" login page to Universal Products. If you receive a sign in error prior to seeing the login screen (screenshot below), see system requirements