I have an Exchange 2003 server I can access internally. I cannot access OWA externally. I do have ISA or a front end server. I'm not using a SSL certificate. I want to be able to access OWA externally with the least amount of hassle. Mail is flowing in and out normally to all of the clients. I did not build this server and usually have never experienced this problem before. Oh yeah, POP3 is working. HELP!