Problems accesing OWA thru Firewall Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Messaging Software › Exchange 2000 / 2003 › Problems accesing OWA thru Firewall This topic has 1 reply, 2 voices, and was last updated 14 years, 5 months ago by Noam Greenberg. Viewing 1 post (of 1 total) Author Posts JeanLucPicardMember May 25, 2006 at 8:10 am #112275 Hi guys I have Exchange 2003 Ent SP2 on a Windows 2000 Domain. Every user can access OWA from the internal network, but not from outside. I need to open any port at my firewall in order to access OWA?. I have 2 firewalls, a Fortinet Firewall (Hardware) and a Linux Firewall (software). Thanks. JLP Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.