You work as a Systems Administrator for your company. The company has a subscription to Microsoft 365. All users in the company have a Microsoft 365 E3 license.
All users use Microsoft Skype for Business Online for collaboration.
You plan to migrate all users to Microsoft Teams.
You need to ensure that users can use both Microsoft Skype for Business Online and Microsoft Teams during the migration period.
You need to configure the Teams upgrade settings to ensure that users receive chats and calls in Skype for Business but use Microsoft Teams for group collaboration and meeting scheduling.
Which of the following coexistence modes should you configure?