A. From the Microsoft Teams admin center, set Download the Teams app in the background for Skype for Business users to On.

B. From the Microsoft Teams admin center, create an app setup policy that includes the Microsoft Teams app, and then assign the policy to all users.

C. From the Microsoft Intune, push Microsoft Teams to all the devices.

D. Create a Group Policy Object (GPO) that contains an app package, and then link the GPO.