I am using Sharepoint online and i want to create document management system for overall organization to manage documents internally as well as share documents externally to collaborate with our multiple customers , we don't want any leakage of information. What is the best way to design and structure the whole system to support all of our needs? Please help me on the solution considering: 'No apps catalog' access.
How big MNC's like accenture, even Microsoft structure their document management system to collaborate internally as well as with their customers.