The ability for users to create private channels within a team is controlled by a Teams policy. By default, the global (Org-wide default) policy allows private channel creation. To prevent specific users from this action, an administrator must create a new custom Teams policy where the "Create private channels" setting is turned off. This new policy is then assigned directly to the specific users who should be restricted, overriding the global default for them.

B: A meeting policy controls features available within Teams meetings, such as screen sharing, recording, and transcription, not channel creation.

C: A setup policy is used to customize the Teams app experience for users, such as pinning specific apps to the navigation bar.

D: A permission policy controls which apps (e.g., third-party, custom) users are allowed to install or use within Teams.

1. Microsoft Learn. (2024). Manage Teams policies in Microsoft Teams. The documentation states

"You can use the global (Org-wide default) policy or create and assign custom policies. Users in your organization will get the global policy unless you create and assign a custom policy."

2. Microsoft Learn. (2024). Private channels in Microsoft Teams. Section: "Private channel creation". It specifies

"As an admin

you can use policies to control which users in your organization are allowed to create private channels... This is controlled by the Create private channels setting in the Teams policy."