For example, if you have significant Skype for Business Server on-premises assets with a complex Enterprise Voice deployment, but want your users to enjoy modern meetings as quickly as possible, you might want to evaluate using the Skype for Business with Teams Collaboration and Meetings mode, also known as Meetings First. However, a user can be assigned other coexistence modes to prevent this capability overlap for the user, in which case interoperability between Teams and Skype for Business is available. Islands mode allows the user to run Teams alongside Skype for Business with similar functionality available in both clients that is, the capabilities overlap. The default coexistence mode for on-premises users is Islands.

Depending on what configuration you choose when providing Teams, these capabilities can overlap with the capabilities delivered by Skype for Business for a given user. Chat, calling and meeting functionality was also historically available in Skype for Business. Teams delivers collaboration capabilities, chat, calling, and meeting capabilities. In addition, the sections describe the interoperability (interop) that occurs between users on Skype for Business clients and users on Teams clients, and how interop is affected by the chosen coexistence mode. The following sections describe the coexistence modes that are available before you decide to upgrade on-premises Skype for Business Users to TeamsOnly, and the capabilities each mode offers. Users with an on-premises Skype for Business Server account may have any coexistence mode other than TeamsOnly. However, organizations with an on-premises deployment of Skype for Business Server may have users who are still homed on-premises these users can't be TeamsOnly.

TeamsOnly mode ensures the users have full functionality of Teams.

Coexistence of Teams and Skype for Business overviewĮver since the retirement of Skype for Business Online, all users in a pure-online organization (that is, an organization that doesn't have an on-premises deployment of Skype for Business) have a co-existence mode of TeamsOnly. Join the Plan your upgrade session first to get started. Watch the following session to learn about Coexistence and Interoperability.Īdditionally, you can join us for live, interactive workshops in which we'll share guidance, best practices, and resources designed to kick start upgrade planning and implementation.

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