exchange server doesn't work after updating to ios 6.1.3 iPhone 5

I have a 64gb iPhone 5.  After updating to iOS 6.1.3, I can no longer receive email to my exchange account.  I keep getting an "unable to verify" message.  This happened immediately after I updated the phone.  I tried turning the phone off and on after the update, and I then tried deleting the account and reentering the information.  I did not have any luck.  Has anyone had a similar problem?