Navigating SharePoint App Permissions After Azure ACS Retirement

With the retirement of Azure ACS (Access Control Services), the familiar SharePoint page (_layouts/15/appprincipals.aspx) used to view and manage app permissions is no longer available. Previously, developers could quickly inspect and revoke app permissions directly from this interface. Now, permission management has shifted to more modern approaches using Azure AD app registrations and SharePoint Online PowerShell. To review and remove permissions, developers should leverage tools like the Microsoft Graph API, Azure Portal (for Enterprise Applications and App Registrations), or SharePoint Online Management Shell (Get-SPOSite, Get-SPOAppPrincipal, and related cmdlets). This transition encourages better alignment with current security practices, centralized identity management, and improved governance across Microsoft 365 environments.