Hi Nino and Johnny,
thanks for your reply.
No, I do not mean the "root permissions" in this case. I'm talking about having no (empty) permissions on the individual folders. And the users are still able to access... So I thought, "Author" could be the default?
BTW, how long does it take before changes permissions are active on the user-side? In contrary to a local on premise domain setup, where DCs have to be in sync, etc. - what is the expected behavior within an Office 365 tenant?
TNX