Office 365 is central to your business needs and business continuity. However, it exposes a large (maybe even the largest) risk surface in your organisation. It is, therefore, crucial to secure it enough to mitigate this ever-present and continuous risk but keep it open enough to ensure as fluid a business as possible. Getting this balance right is difficult, and it can be hard to know where to start. Adopting a common security standard can be a great place.