In Windows Phone Calendar phone contact info are unavailable. Why?

[WPCentral Question]

In Windows Phone Calendar when I want to add an attendee to a meeting only contacts with email show up as options. Those with only phone contact info are unavailable. Why?

 

[RumoredNow]

Are you sure you are adding the event to the Calendar from the same account that holds your phone # Contacts???

Please join the site and reply in this thread with additional info or more questions on this issue...