Starting January 2026, Teams Phone porting requires a one-time Know Your Customer (KYC) process via Teams Admin Center. Admins must submit business info and documents for validation before port-in requests. Existing numbers are unaffected. This applies globally and includes all tenants, with role-based access control via Entra ID.
Applies to: Microsoft Teams
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).