Your company has a Microsoft 365 E5 subscription.
You enable guest access for Microsoft Teams.
You need to prevent all users from downloading and opening files that contain malware by using Microsoft Teams channels.
What should you do first?

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
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You company has a Microsoft 365 subscription and a Virtual Desktop Infrastructure (VDI) solution.
The company's Microsoft Teams upgrade policy is set to Teams only coexistence mode.
You deploy the Microsoft Installer (MSI) package for Microsoft Teams to the VDI solution.
Several months later, users of the VDI solution report that their workstation is missing several new Microsoft Teams features.
You need to ensure that the VDI solution users can use the new Microsoft Teams features.
Solution: You uninstall the Microsoft Teams MSI package, and then reinstall a new Microsoft Teams MSI package.
Does this meet the goal?

You have a Microsoft 365 subscription that uses Microsoft Teams. The subscription contains 1,000 users in the groups shown in the following table.

You need to configure Microsoft Teams to meet the requirements. The solution must minimize administrative effort.
What should you use?

You need to configure the environment to meet the security requirements for the R&D group.
What should you do first?

Your company uses Teams.
You plan to assign an enhanced encryption policy to enable end-to-end encryption for Teams calls.
Which features support end-to-end encryption for one-to-one Teams calls?