Default [Q] Dialer/Contacts App with Exchange support

I've been trying to find a good replacement dialer app, but one thing I've noticed about all of the ones I can find... is that they don't integrate with Exchange. I don't mean they won't get my contacts from my address book, but I mean they won't use the global address book like the built in. Does anyone know of or use a dialer/contact app that specifically can also search exchange global address books?