QUESTION 117 Your company has 200 users. You plan to upgrade all the users from Microsoft Skype for Business Online to Microsoft Teams. Enterprise Voice must be enabled for all users. You need to…

"Skype for Business with Teams collaboration" mode means users primarily use Skype for Business for chat, calling, and meetings, while Teams is used for collaboration features like channels and files. This does not represent a full upgrade where Enterprise Voice is solely on Teams.

"Islands" mode allows users to run both Skype for Business and Teams independently, without full interoperability, leading to potential confusion and a fragmented experience. It is not an upgrade mode where Teams becomes the sole communication client.

The "Teams only" coexistence mode means that all incoming chats and calls land in Teams, and users initiate all new chats, calls, and meetings from Teams, making Teams the primary and only client for these functionalities. This mode is the ultimate upgrade state where Enterprise Voice is fully enabled and managed within Teams for all users.

"Skype for Business with Teams collaboration and meetings" mode still designates Skype for Business as the primary client for chat and calling, with Teams handling new meetings and collaboration. This is not the desired final state where all users are upgraded to Teams for all functions including Enterprise Voice.