Power BI Reports Server - Legal situation when sharing reports with a subsidiary organization

[Patho]

Hello Power BI Community,

Regardless of the Report Server license model, I am concerned about the legal classification regarding the use of the PBI Report Server for users outside the parent organization.

I am aware that a Pro license is required only to publish a report to the server, but not to view reports.
Source:
https://view.officeapps.live.com/op/view.aspx?src=https%3A%2F%2Fwwlpdocumentsearch.blob.core.windows...

and

https://learn.microsoft.com/en-us/power-bi/report-server/get-started#licensing-power-bi-report-serve...

But what about for report viewers outside the actual licensed organization?

E.g. users or guest users from a subsidiary organization or even completely external users ( invited aas a guest in Azure).
-> What is the legal situation here? Could not find the info from my first source unfortunately.

Kind regards,
Patho