Microsoft Teams

Teams is an Office 365 Collaboration tool that allows you to integrate Microsoft apps and files with everyone on your team all in one location. Give your team built-in access to everything they need right in Office 365. Manage all your conversations, files, and tools in one team workspace. Enjoy instant access to OneDrive OneNote, Planner. Create and edit documents right in the app.

You need an enterprise Office 365 account for the most benefit, but Microsoft allows a limited personal Teams account setup through your personal Microsoft account.