The external communication with partners, customers and clients can be a relevant topic for an enterprise messaging app. Some examples are the collaboration with partners on a project, the follow-up discussion of a workshop with clients, the exchange of information with a patient, the scheduling of a meeting with a customer, etc. While these use cases can improve the productivity, the external communication can also be a potential security leak of client data and intellectual property of the enterprise. Teamwire provides two different options for the external communication in order to balance productivity and security and meet different requirements.