I am the Owner of a 2016 Site Collection with a complete set of multilevel subsites. On a 3rd level subsite I have a modern page with an excel viewer Webpart. Permissions are not inherited anymore, but "everyone except external users" has read permissions to this site. That works as intended for all the other sites and content, but not for this modern page. So people now start requesting access, which I wanted to avoid in the first place. Any idea?
What I have tried so far: - Check and check and check again the permissions. All correct. The page and the Webpart do not have unique permissions. - I have read somewhere, that "everyone except external users" would need same permission on site collection level as well to work. Did that, nothing changed.