public async Task <dynamic> deleteEmailAttachments(string[] attachmentIds, string emailId, string[] attachmentUrls)
        {
            // Get access token
            var token = Data.GetUserSessionToken(Settings.GetUserAuthStateId(ControllerContext.HttpContext), Settings.AzureADAuthority);

            var attachments = await GraphApiHelper.deleteEmailAttachments(token.AccessToken, attachmentIds, emailId, attachmentUrls);

            return(Json(attachments, JsonRequestBehavior.AllowGet));
        }