I was recently working on a PWA application that utilizes SSO and one odd behavior that I noticed right off the bat was the fact that the SSO redirects forces the application to open a new window inside the browser instead of carrying the redirect inside the application shell. This is problematic as it defies the whole purpose of a PWA which attempts to make a web application feel native.
Check out this blog from Premier Developer consultant Marius Rochon for information on how to integrate ASP.NET applications with CA Siteminder.
A customer was having a problem integrating an ASP.NET application with CA Siteminder v12.52. Firstly, there was a problem with using SAML2.0 token formats.