Virtual Server with Exchange OnPrem with ADFS.

[Brent-ITSolutions]

Hi, I've been struggling with this one for a couple of weeks now and haven't found a solution.

In my lab environment with a single IP address available I was running a 600c perfectly well, but I decided to change to a 200e (v7.6.0 build3401) for the additional functionality.

Internally I am running an On-Premise Exchange Server, an ADFS Server for webmail authentication, along with an unrelated website all on separate servers.  I use virtual servers (HTPS) to connect to the appropriate real server based on the host header. e.g. (not real IP addresses)

mail.myname.com (100.100.100.1:443) -> Server 1 (192.168.0.1:443)

adfs.myname.com (100.100.100.1:443) -> Server 2 (192.168.0.2:443)

website.myname.com (100.100.100.1:443) -> Server 3 (192.168.0.3:443)

• Browsing to the Web Server works perfectly.
• Browsing directly to the ADFS authentication page (passing appropriate parameters) works perfectly.  Including redirecting back to the mail server after authentication.
• Browsing to the webmail server leaves the browsing spinning (it doesn't timeout) and doesn't redirect to the ADFS authentication page.
  • Connecting internally (not through the fortigate) works perfectly
  • Sometimes it will quickly redirect to ADFS server and everything is happy.  This usually happens for the first 5 minutes after making any sort of change to the virtual server (e.g. adding another Real Server) then it goes back to the same behaviour.
  • Sometimes leaving the web page loading it will eventually load the adfs authentication page.

Does anyone have any insight as to why this was working on the 600c with the same configuration and I cannot get it to work on the 200e?

Thanks