NC OIDC Login with ManageEngine ADSelfService OIDC SSO

[JBBERLIN77]

I don't know if this is the right place to ask such questions. But I have problems configuring the NC OIDC login together with the ManageEngine SSO.

With Keycloak it works without problems but unfortunately not with ME SSO.

I always get the following error message:

Invalid authorization request. Please contact your admin to check if the requested redirect URI is registered for this client.

So I assume that something is wrong on the ME SSO side.

Would be really helpful if someone here could give me a hint for it because you have a lot of 2FA including working SMS 2FA/MFA.