I have set up OWA and have a problems with some of my users not being able to authenticate. I only have one AD site but 2 different email address. @.parkcounty.us and @.parkcountysheriff.net. Our domain name is parkcounty.us(ext) and parkcounty.local (int). It seems that only the parkcountysheriff peope can't log in. What do I need to set to make this work. Everyone is a domain user for parkcounty.local.