Quick update, I did some testing and discovered it's not CAS 7 that changed 
the functionality, it was actually CAS 6.6.14. I believe it's something 
about this 
commit, 
https://github.com/apereo/cas/commit/2b367835ed22478eb853a267760869a1d2eaf3ae, 
that changed how it works. I am most definitely not a Java developer so I 
can't decipher exactly whats happening.

Thanks!

On Friday, May 10, 2024 at 10:39:36 PM UTC-5 jbstowe22 wrote:

> We have a few old vendor apps that use SAML 1.1 and those are working fine 
> with our cas 6.6.x instance that is delegating to Azure/Entra AD.
>
> We recently spun up a test instance of CAS 7 and those apps seem to reject 
> the ticket from CAS 7 when being delegated to Azure (they work when not 
> being delegated). I believe it has to do with the url parameter CAS sends 
> after receiving the Azure delegation response. In CAS 6.6 it sends the 
> SAMLart url parameter:
>
> ?SAMLart=ST-
>
> But in CAS 7 it sends a ticket param:
>
> ?ticket=ST-
>
> It almost seems if CAS forgets it is using SAML 1.1 after the delegation 
> is complete. Anybody else experience this or know if there's some config we 
> are missing in CAS 7 causing this?
>
> Thanks!
>

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