Deployed Enterprice License not visible, Enterprise Features not available

We deployed Camunda Cockpit as a custom web application in a Docker image.
It is set up as a Spring-Boot Project.
We have set up our own authorizations, including a copy of the camunda-admin authorizations (everything allowed on all resources), and deployed them to the database.

Unfortunately, only a user directly belonging to the group ‘camunda-admin’ can view the license in the cockpit or access enterprise features.
No user assigned to another group is able to do this. He sees an error message like this: ’ Access denied! You are unauthorized to .

The license itself is deployed correctly, and is visible to all users assigned to the group ‘camunda-admin’ as well.
The license file is deliverd to the directory ‘BOOT-INF/classes/camunda-license.txt’ inside the jar archive.

Also we have activated Oauth2 SSO against Azure-AD. Is a special Api Permission (MS Graph Api permission) required to enable the Cockpit to process the deposited license file?