To allow User1 to review permissions and grant consent to App1 on behalf of all users in the organization, the required role is: Global Administrator

 ✅ Global Administrator

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📌 Explanation:

To allow User1 to review permissions and grant consent to App1 on behalf of all users in the organization, the required role is:

Global Administrator

This is because:

• Granting tenant-wide consent to apps (especially for Microsoft Teams apps that require permissions like reading user profiles or accessing calendars) requires elevated privileges.
• Only Global Administrators can consent to applications on behalf of the entire organization in Microsoft Entra ID (formerly Azure AD).

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❌ Why the other options are incorrect:

• Billing Administrator: Manages billing and subscriptions, not app permissions.
• Teams Administrator: Manages Teams settings and policies, but cannot grant org-wide app consent.
• Teams Communication Administrator: Manages calling and meeting features, not app permissions.

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🛡️ Principle of Least Privilege Note:

While Global Admin is required for this specific task, it's best to remove the role after consent is granted or use Privileged Identity Management (PIM) to assign it temporarily.