Unable to determine your identity RRS feed

  • Question

  • When I deployed a provider hosted app, got following error:

    Unknown User
    Unable to determine your identity. Please try again by launching the app installed on your site.

    And I debugged it found "string contextTokenString = TokenHelper.GetContextTokenFromRequest(httpRequest)" return value is null, it means hosted application cannot get SharePoint token. But I don't know why.

    I tried several approaches, none worked!

    Anybody can help me?


    Thursday, September 4, 2014 2:54 PM