An EU official is preparing a confidential report on a Common Foreign and Security Policy (CFSP) mission that requires real-time collaboration with diplomats from member states and other EU institutions, including the European Commission. The official must choose the most appropriate digital tool to facilitate this secure and coordinated collaboration, ensuring the exchange of sensitive data under the framework of the Union's Foreign Policy. Which of the following actions is most aligned with the described functions and objectives of the European External Action Service (EEAS) for this type of operation?