Microsoft Edge SMSESSION is intermittently not sent to Web Agent

Products

• CA Single Sign On Agents (SiteMinder)
• SITEMINDER

Issue/Introduction

 

Running Web Agent, when user accesses the resource using Edge browser
version 91.0.864.37 (Official build) (64-bit), then the browser
intermittently doesn't send the SMSESSION cookie and as such the
browser gets redirected to the login page.

This issue is not observed on earlier version of Edge, nor on other
browsers.

 

Cause

 

From browser traces, we see that the browser intermittently doesn't
send the SMSESSION cookie it has in memory as it should.

 

Resolution

 

Investigate with Microsoft to understand what has changed in the last
version of MS Edge which might cause randomly the browser not to send
the SMSESSION cookie.

MS might also be in better position to tell you if this is anyhow
related to samesite feature, and how to disable samesite feature in MS
Edge.