See the Teams and Groups: Security guidelines to find out your responsibilities, privacy and legal requirements for using these tools.
Teams
Teams is a collaborative communication infrastructure that organizes a team's chats, video calls, voice calls, documents, and files. Through Teams, users can connect with each other, hold meetings, reference SharePoint dashboards, and connect with other third-party solutions. In this way, Teams creates a consolidated dashboard of many services, which can include the services that team members are already connected to through Office 365 Groups. Teams can also be used to modify and maintain Office 365 Groups if desired. Teams can be enabled for room accounts to facilitate the interview process. See the Teams: Getting started and Teams: Owners Guide for more information.
Groups
A Nexus 365 Group is a list of users who are given access to a set of tools: MS Planner, OneNote, SharePoint, and others. These users will have a shared mailbox within Microsoft Office as well as a shared calendar that they can access. Office 365 Groups and Teams can work together and, in fact, creating a Team can automatically generate a Nexus 365 Group. In effect, creating a group is a "back-end" action which connects users to a number of different tools that they will be using together.
Nexus 365 Groups may let users connect with each other through OneNote and SharePoint, but they will not offer the communication features and calling features of Microsoft Teams.
When you set up a Nexus 365 Group you’ll be equipped with:
- Shared Inbox – For email conversations between your members. This inbox has an email address and can be set to accept messages from people outside the group and even outside your organization, much like a traditional distribution list
- Shared Calendar – For scheduling events related to the group
- SharePoint Document Library – A central place for the group to store and share files
- Shared OneNote Notebook – For gathering ideas, research, and information