Within Microsoft Teams, what advanced configuration option should an administrator use to control which third-party applications are available for team members to install?

To control which third-party applications are available for team members to install within Microsoft Teams, an administrator should use the Teams apps section within the Microsoft Teams admin center. This area provides granular control over app permissions and availability. Specifically, administrators can manage apps using several methods: First, administrators can 'Allow' or 'Block' individual apps. This provides a direct method of controlling which specific apps are permitted or prohibited within the Teams environment. Secondly, app permission policies can be created and assigned to specific users or groups. These policies determine which categories of apps users are allowed to install. For example, a policy might allow users to install only apps published by Microsoft or verified publishers. A global (Org-wide default) app permission policy applies to all users by default, and custom policies can override this global policy for specific users or groups. Thirdly, administrators can upload custom apps to the Teams app store for internal use. This allows organizations to develop and deploy their own applications tailored to their specific needs, while maintaining control over app distribution. Fourthly, administrators can control third-party app access at the organizational level via settings in Azure Active Directory, governing consent policies and data access. These combined controls allow organizations to strike a balance between enabling useful third-party integrations and maintaining security and compliance within their Microsoft Teams environment.