Smartphone Configuration

Having issues getting your iPhone/any phone to connect to exchange?

This might be why: 

The issue may be due to the user activating more than 10 devices on his Exchange ActiveSync account. So all I had to do to get his email working again, was log into Exchange OWA and go to Options > See All Options > Phone. Once there, you will see a list of devices that have been setup with that email account. The problem is, you can't have more than 10 different devices setup with Exchange, and every time you get a new phone or tablet it takes one of those activations. So to fix this problem, just delete some of the old devices from off the list to free up more slots for new devices. (Exchange usually does send you an email stating that you have run out of activations.)