Microsoft Edge browser enters infinite redirect loop when accessing an application protected by SiteMinder Integrated windows Auth

Products

• SITEMINDER
• CA Single Sign On Agents (SiteMinder)
• CA Single Sign On Secure Proxy Server (SiteMinder)
• CA Single Sign On Federation (SiteMinder)

Issue/Introduction

New application is protected by SiteMinder using integrated windows auth.

These are two different application URL's that users use to access the application:

URL1: http://example.com/example_app/

URL 2: http://example_hostname/example_app/

When users access URL1, it going through infinite redirect loop. 

When users access URL2, it working fine. No infinite redirect loop. 

Customer only sees this behavior only on Microsoft Edge.

However, the same Edge browser works for other IWA protected applications.

Environment

Release : 12.0

Component : SITEMINDER -WEB AGENT FOR IIS

SiteMinder IIS 10.0 WebAgent, Version 12.52 QMR01, Update HF-10, Label 2831.

Cause

There is no error related to SiteMinder components regarding user auth/AZ.

With other two type of browsers working, it should prove the theory that SiteMinder agent settings are working.

In DNS, the setting for example.com and example_hostname are different too.

Resolution

Customer was able to identify the issue that causes this behavior in Edge.

Applications that are facing this issue have their application URL’s added to Edge compatibility list (about:compat), which forces these applications URL’s to use IE11 engine instead of Edge engine.