Hi @rhessinger
Thanks for telling me about the debug endpoint, would have been nice if debug options was made visible in the documentation, since there is already a header for troubleshooting -> https://docs.inedo.com/docs/installation/saml-authentication/various-saml-overview#troubleshooting.
Using the debug output we managed to figure out our issue and get it working.
In our case NameID was being sent as an attribute instead of being part of the subject, resolving that fixed our issue.
<AttributeStatement>
<Attribute Name="NameID">
<AttributeValue>User ID</AttributeValue>
</Attribute>
</AttributeStatement>
changed to
<Subject>
<NameID Format="urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified">User ID</NameID>
</Subject>
Other information omitted for privacy.
Thank you for your assistance in resolving this.
Regards
Nils