Using a third party solution (TeamMate Connector) you can transform Microsoft Teams into a softphone and use it to dial out and receive phone calls using our VoIP SIP service. You will need a Microsoft E1 license at a minimum to leverage this connection. (A Microsoft Office 365 / Microsoft 365 E1 license is the entry‑level Enterprise plan designed for organizations that need cloud‑based productivity and collaboration tools without desktop Office apps. The core idea: E1 gives you the web versions of Office apps plus email, Teams, OneDrive, and SharePoint at a low cost: $8/user/month as of 2026.)