"Authenticate as a user" in Provider Hosted App

98% of our app works fine in mvc5 app this:

 [sharepointcontextfilter]
        public actionresult index()
        {
            var spcontext = sharepointcontextprovider.current.getsharepointcontext(httpcontext);

            using (var clientcontext = spcontext.createapponlyclientcontextforsphost())
            {

but in 1 scenario, task (not user) must access list , retrieve items, same error described here: http://tomaszrabinski.pl/wordpress/2013/03/18/sharepointonlinecredentials-and-msoidclil-dll-file-not-found-exception/

what correct way let app authenticate credentials (user@mycompany.dk, mypassword)?

thanks

---

jorgen

 spcontext.createapponlyclientcontextforsphost()

above code works if have use apponly policy, in 1 sense elevated privilege for app. 

but in your scenario , need useronly policy or app+user.

try below method , , see if works.

var clientcontext=spcontext.createuserclientcontextforsphost();

refer below link know more sharepointcontext handler.

http://hackingkart.com/leveraging-sharepointcontext-sharepoint-apps/

mark answer , if find helpful.

---

abu shaeeb

SharePoint  ,  Apps for Office and SharePoint  >  Developing Apps for SharePoint 2013