I am trying to subscribe webhook for all the lists in all O365 SharePoint sites. Able to subscribe most of the sites, but in few sites i am getting access denied error. I have site collection admin privilege in all the sites.


            List lst = _ctx.Web.Lists.GetByTitle(ListTitle);
            await _ctx.ExecuteQueryAsync();
            if (lst != null)
                var subscription = lst.GetWebhookSubscriptions(); // getting error in this line



   {"odata.error":{"code":"-2147024891, System.UnauthorizedAccessException","message":{"lang":"en-US","value":"Access denied. You do not have permission to perform this action or access this resource."}}}

May I know what could be the issue?

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