Microsoft Graph API: “Insufficient privileges to …” DELETE a Group

Recently, had a task to DELETE an Azure AD Group by using application client credentials. Custom application were registered in Azure AD. All possible permission were assigned to the application But the DELETE https://graph.microsoft.io/en-us/docs/api-reference/v1.0/api/group_delete request failed anyway with the error below { “error”: { “code”: “Authorization_RequestDenied”, “message”: “Insufficient privileges to complete the operation.”, “innerError”: { “request-id”: