You have a Microsoft Office 365 subscription. You discover that apps from a third-party publisher have security issues. You need to block all apps from the publisher. What should you use in the Microsoft Teams admin center?

To block all apps from a specific third-party publisher, the administrator should use the 'Manage apps' page in the Microsoft Teams admin center. This page serves as the central catalog for all applications available to the organization. An administrator can filter the app list by the publisher's name, select all the apps from that publisher, and then use the 'Block' action to prevent them from being used across the entire organization. This is the most direct and efficient method for this task.

A. Org-wide app settings control high-level permissions, such as allowing or blocking all third-party apps, but managing apps from a specific publisher is done on the Manage apps page.
B. Policy packages are used to bundle and assign a set of policies to users with similar roles, not for blocking specific apps or publishers.
C. Permission policies define which apps users can access. While you could block apps here, you would have to add each app individually, which is less efficient than blocking them from the central 'Manage apps' page.

1. Microsoft Docs. (2023). Manage your apps in the Microsoft Teams admin center. Microsoft Learn. Retrieved from https://learn.microsoft.com/en-us/microsoftteams/manage-apps. (This document describes the 'Manage apps' page as the central location to "allow or block specific apps for your organization" and details the available actions.)

2. Microsoft Docs. (2023). Manage app permission policies in Microsoft Teams. Microsoft Learn. Retrieved from https://learn.microsoft.com/en-us/microsoftteams/teams-app-permission-policies. (This explains that while policies control user access, the global allow/block status of an app is set on the 'Manage apps' page.)