Tony Redmond, Office 365 expert and owner and principal of Redmond & Associates Consulting, notes in his post about the Teams enterprise/consumer federation that this feature covers chat, not calling or file exchanging, between Teams business and consumer users. Up until this feature rolls out, any attempt to chat between Teams enterprise and Teams consumer results in email, rather than an immediate chat, Redmond adds. Microsoft added the ability for Teams users to chat and/or call with Skype consumer users in 2020. Last year, Microsoft integrated a Teams chat button into Windows 11 as a way to get customers to try using the Teams personal/consumer features.