A free version of Teams lets you call and chat as much as you want

A free version of Teams lets you call and chat as much as you wantThe program, which brings together chat, meetings, calling, files and apps in a shared workspace, will be available in 40 languages for up to 300 people.https://news.microsoft.com/wp-content/uploads/prod/sites/68/2018/04/Surface_B2B_Finance_5_Book.jpg24791862