Yes.
There is a section on IdP selection, 
https://apereo.github.io/cas/7.0.x/integration/Delegate-Authentication-DiscoverySelection.html

Ray
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From: [email protected] <[email protected]> on behalf of wouldsmina 
<[email protected]>
Sent: 10 July 2024 03:16
To: [email protected] <[email protected]>
Subject: Re: [cas-user] Delegated Authentication SAML2 : Single EntityID

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Hello Ray,
Thanks for your reply.
Here is an example of what I did:

cas.authn.pac4j.saml[6].keystore-password=password1
cas.authn.pac4j.saml[6].private-key-password=password2
cas.authn.pac4j.saml[6].service-provider-entity-id=https://auth.icoopeb.org/cas/sp/ufra
cas.authn.pac4j.saml[6].service-provider-metadata-path=/etc/cas/config/sp-metadata-ufra.xml
cas.authn.pac4j.saml[6].keystore-path=/etc/cas/config/samlKeystore-ufra.jks
cas.authn.pac4j.saml[6].identity-provider-metadata-path=https://idp-cafe.ufra.edu.br/idp/shibboleth
cas.authn.pac4j.saml[6].destination-binding=urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect
cas.authn.pac4j.saml[6].client-name=idpufra
cas.authn.pac4j.saml[6].display-name=UFRA
cas.authn.pac4j.saml[6].logout-request-binding=

cas.authn.pac4j.saml[7].keystore-password=password3
cas.authn.pac4j.saml[7].private-key-password=password4
cas.authn.pac4j.saml[7].service-provider-entity-id=https://auth.icoopeb.org/cas/sp/uce
cas.authn.pac4j.saml[7].service-provider-metadata-path=/etc/cas/config/sp-metadata-uce.xml
cas.authn.pac4j.saml[7].keystore-path=/etc/cas/config/samlKeystore-uce.jks
cas.authn.pac4j.saml[7].identity-provider-metadata-path=https://login.uce.cedia.edu.ec/saml2/idp/metadata.php
cas.authn.pac4j.saml[7].destination-binding=urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect
cas.authn.pac4j.saml[7].client-name=idpuce
cas.authn.pac4j.saml[7].display-name=Universidad Central del Ecuador
cas.authn.pac4j.saml[7].logout-request-binding=

cas.authn.pac4j.saml[8].keystore-password=password5
cas.authn.pac4j.saml[8].private-key-password=password6
cas.authn.pac4j.saml[8].service-provider-entity-id=https://auth.icoopeb.org/cas/sp/uniandes
cas.authn.pac4j.saml[8].service-provider-metadata-path=/etc/cas/config/sp-metadata-uniandes.xml
cas.authn.pac4j.saml[8].keystore-path=/etc/cas/config/samlKeystore-uniandes.jks
cas.authn.pac4j.saml[8].identity-provider-metadata-path=https://login.uniandes.cedia.edu.ec/saml2/idp/metadata.php
cas.authn.pac4j.saml[8].destination-binding=urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect
cas.authn.pac4j.saml[8].client-name=idpuniandes
cas.authn.pac4j.saml[8].display-name=UNIANDES
cas.authn.pac4j.saml[8].logout-request-binding=

If I understand what you're proposing, I have to do this:

cas.authn.pac4j.saml[6].keystore-password=password1
cas.authn.pac4j.saml[6].private-key-password=password2
cas.authn.pac4j.saml[6].service-provider-entity-id=https://auth.icoopeb.org/cas/sp/all
cas.authn.pac4j.saml[6].service-provider-metadata-path=/etc/cas/config/sp-metadata-all.xml
cas.authn.pac4j.saml[6].keystore-path=/etc/cas/config/samlKeystore-all.jks
cas.authn.pac4j.saml[6].identity-provider-metadata-path=https://idp-cafe.ufra.edu.br/idp/shibboleth
cas.authn.pac4j.saml[6].destination-binding=urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect
cas.authn.pac4j.saml[6].client-name=idpufra
cas.authn.pac4j.saml[6].display-name=UFRA
cas.authn.pac4j.saml[6].logout-request-binding=

cas.authn.pac4j.saml[7].keystore-password=password1
cas.authn.pac4j.saml[7].private-key-password=password2
cas.authn.pac4j.saml[7].service-provider-entity-id=https://auth.icoopeb.org/cas/sp/all
cas.authn.pac4j.saml[7].service-provider-metadata-path=/etc/cas/config/sp-metadata-all.xml
cas.authn.pac4j.saml[7].keystore-path=/etc/cas/config/samlKeystore-all.jks
cas.authn.pac4j.saml[7].identity-provider-metadata-path=https://login.uce.cedia.edu.ec/saml2/idp/metadata.php
cas.authn.pac4j.saml[7].destination-binding=urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect
cas.authn.pac4j.saml[7].client-name=idpuce
cas.authn.pac4j.saml[7].display-name=Universidad Central del Ecuador
cas.authn.pac4j.saml[7].logout-request-binding=

Best regards

Le mer. 10 juil. 2024 à 00:37, Ray Bon <[email protected]<mailto:[email protected]>> a 
écrit :
Wouldsmina,

Once your SP metadata is in the specified location, cas will not recreate it.
Are you using a different entityId or key for each IdP? That is not necessary.

Ray
________________________________
From: [email protected]<mailto:[email protected]> 
<[email protected]<mailto:[email protected]>> on behalf of wouldsmina 
<[email protected]<mailto:[email protected]>>
Sent: 09 July 2024 02:03
To: CAS Community <[email protected]<mailto:[email protected]>>
Subject: [cas-user] Delegated Authentication SAML2 : Single EntityID

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Hello,
I want to use identity delegation to allow other IdPs to authenticate a number 
of my services. I was inspired by this documentation: 
https://fawnoos.com/2023/10/04/cas66-delegate-authn-saml2-idp/. But I notice 
that for each declared IdP, CAS produces different EntityId and metadatas.

The IdPs concerned are part of the EduGain identity federation and I'd like to 
declare a single SP (for simplicity and to comply with the charter). Do you 
know if it's possible to configure CAS to create a single EntityId for all 
declared IdPs?

Best regards,
Wouldsmina

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