Auth0 SAML - Atlassian as Service Provider returns 'Audience is invalid'

[Dmitrij Bučkovský]

Hello people,

I would like to have Auth0 as Identity Provider and Atlassian as Service Provider, so I can sign in into Jira with Auth0 account.

I use Auth0 development environment and Atlassian trial version. I've created Auth0 Single Page Application with SAML2 Web App add on enabled. I also have Atlassian Admin account. And I want to login into Atlassian with Auth0 account.

I was setting Atlassian IdP section up following this tutorial and SAML single sign-on with Auth0  setup instructions.

My Atlassian settings are:

Identity provider Entity ID: urn:<tenant_name>.us.auth0.com
Identity provider SSO URL: https://<tenant_name>.us.auth0.com/samlp/<application_client_id>

When I try to login via Identity Provider Login URL: https://<tenant_name>.us.auth0.com/samlp/<application_client_id> I can log into the  Auth0, but when I'm redirected to Atlassian, I get it's login error page with no info. However, in the URL there is error description Audience is invalid.

https://id.atlassian.com/error?error=access_denied&error_description=Audience%20is%20invalid.

Audience is Identity provider Entity ID (in Atlassian) and Issuer (in Auth0)?

Do you have any idea if I set up something wrong or what could be the issue?

Best Regards,
Dmitrij