Did you correclty define Projeqtor SP in the Azure AD ?
https://docs.microsoft.com/fr-fr/azure/active-directory/manage-apps/configure-single-sign-on-portal

but nothing works

This is not clear.
Please explain behavior.
"Nothing works" would probably mean your laptop is shu tdown 👿 .
Also look for traces or errors logged in projeqtor log fil.

Thanks babynus for the reply!

Ahah, my laptop works great and okay I'll give you more details:
I'v follow the guide Configure SSO from Microsoft Docs, here a sample of my configuration on Azure:

After that I add this:

And finally I have an error:

And my apache access.log looks ok (nothing appear in error.log):

Thanks a lot!

It seems to be a requirement for Azure AD SSO, that are not mandatory with other SAML.
We use OneLogin framework, and I don't see any parameter that would enable requested data (SAMLRequest or SAMLResponse as parameter in HTTP request for binding).

Can you try and use certificate for SP ?
(add sp.cert and sp.pem in sso/cert folder)

Also, if you set parameter "IDP fourni par ADFS" to "Yes", is error message the same ?