Microsoft customers will receive advance notice of significant changes to Office 365 so they can plan effectively. We provide visibility for planned updates that are in development and in the process of being rolled out to the service, as well as items that have been launched and are now generally available for all eligible customers. We contractually commit to maintain core Office 365 features for the term of the customer’s subscription, so customers can be assured that they will not lose the critical functionalities that they depend on each day.