Office 365 Groups is a service for Office 365 commercial and education customers that enables teams to come together and get work done by establishing a single team identity (managed in Azure Active Directory) and a single set of permissions across Office 365 apps including Outlook, OneDrive for Business, OneNote, Skype for Business, Power BI and Dynamics CRM. Office 365 Groups will soon extend to include Office Planner, Delve and Yammer. When a user joins a group, they immediately gain access to all of the assets of the team, such as conversations, meetings and documents.
Read more at source: https://blogs.office.com/2015/12/09/office-365-groups-now-supports-ediscovery-litigation-hold-dynamic-membership-and-more/
