Updating user-specific instances of a second application for individual users of a group based on a data file for the second application being shared via a collaboration object that corresponds to the group within a first application. The instances of the second application present each individual user with their own custom user experience that is configured to provide access to specific content based on object permissions data. An application extension is executable, by the first application, to extend content editing functionalities of the second application into the collaboration object. Responsive to specific content being associated with the collaboration object via the application extension, each of the instances of the second application may be automatically updated to provide direct access to the specific content. Thus, each user within the group defined for collaboration object can access the data file via the collaboration object and their own instance of the second application.