Why are users redirected to the logout URL when authenticating via SSO with SAML?

Why users redirect to the logout URL when they authenticate through SSO with SAML

The common reason for this behavior is the update or change of your server SSL certificate, the SSL installed on the side of your SSO server.

Because the certificate has a new fingerprint, you must update the existing one from the Support account.

If you don't have access to the data of the new certificate, decode the new SSL with an online tool, such as CSR Decoder And Certificate Decoder. Then, grab the new SHA2 fingerprint that looks similar to this:

2E:7E:41:27:0F:E0:D9:A8:E4:5E:68:DC:89:64:5F:A5:D0:FB:47:BF

To update the certificate fingerprint:

In Admin Center, navigate to Account > Security > Single sign-on

Select SAML

Update the Certificate fingerprint field and Save