After contacting the support group prior to purchasing this app to make sure it would work as expected I was looking forward to be able to build and email groups wihtin my Exchange Contacts. NOT SO! Apparently, even though it says in the description it works with MS Exchange contacts and Google Exchange contacts, that is NOT the case. Once you down load and install, the first time you try to build a group you get a pop-up notification saying the Exchange contacts are NOT supported. What? You MUST sync with your computer and allow for this app to doublae/triple your contacts by setting up a local copy of your address book. Even after doing that set-up and trying out the program it was not really useful. You only have the choice of sending your group emails to one or all of the contacts you put on your group email list. Even then, you do not have a chance to choose which ONE (just picks the first listed email for that contact.). I would rate this one a DO NOT BUY! (However, I will say the customer support was good :) )