* Within each team, users can create different channels to organize their communications by topic. Each channel can include a couple of users or scale to thousands of users. * Microsoft Teams works on Android, iOS, Mac and Windows systems and devices. It also works in Chrome, Firefox, Internet Explorer 11 and Microsoft Edge web browsers. * The guest-access feature in Microsoft Teams allows users to invite people outside their organizations to join internal channels for messaging, meetings and file sharing. This capability helps to facilitate business-to-business project management. * Teams integrates with Azure DevOps. References: https://searchunifiedcommunications.techtarget.com/definition/Microsoft-Teams