Updated: July 27, 2020 (November 10, 2019)

Comparing Teams and Skype for Business Coexistence Modes

Jim leads the Directions on Microsoft editorial team and has been writing about technology since the early 1990s. Most recently... more

Coexistence Mode	Interoperation	Target Scenario	Primary Client	Enterprise Voice	Skype Client Used For	Teams Client Used For
Islands	None	Rapid migration	Either	Skype for Business	All functions	All functions except Enterprise Voice or external (federated) messaging
Teams Only	Yes	Migration end state	Teams	Teams	Join Skype meetings organized by non-upgraded or external users	All functions (except Skype-organized meetings)
Skype for Business Only	Yes	Initial setup and testing of Teams	Skype for Business	Skype for Business	All functions	Not used
Skype for Business with Teams Collaboration	Yes	Long-term migration (especially from on-premises)

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