A method relates to authority checks governing user access to business object attachments in a store of business object attachments. The business object attachments are semantically associated with business objects of one or more remote computer systems. The method includes, at a content management interface layer that is communicatively coupled to the store of business object attachments, sending a request for user authority checks on a parent business object of a business object attachment to an originating computer system and receiving results of the user authority checks from the originating computer system.