IdentifierUris domain needs to be registered and verified in your Azure AD primary domain or subdomain.
Go to the Service Provider Metadata tab of the Joomla SAML SP plugin and under the Service Provider Endpoints section you need to update the Application URI as: http://<domain_name>/<site_name>/plugins/authentication/miniorangesaml
Follow the following steps to find the domain name:
- Sign in to the Azure portal with an account that’s a Global Administrator for the organization.
- Select Azure Active Directory/Entra ID.
- Select Custom domain names.