Forum Discussion

Sunil Guntupalli's avatar
Sunil Guntupalli
Copper Contributor
May 08, 2018
Solved

Project Online/SharePoint Online "401 Unauthorized" error when accessing oData URLs programatically

Hi All, I couldn't authenticate Project Online oData URLs using the below piece of code in a C# console application. It was working fine till yesterday from past 1 year. SecureString passWord =...
SharePoint Online
  • Daniel Colarossi's avatar
    Daniel Colarossi
    May 08, 2018

    Hi All,

     

    Another work around is to generate a SharePoint client context and then grab the auth cookie from those credentials and pass it to the rest api request.

     

    authCookie = creds.GetAuthenticationCookie()

    req.Headers.Add(HttpRequestHeader.Cookie, authCookie);

     

    Let me know if you need more details

     

    Thanks

     

    Dan

Mahidhar Venkata Araveti's avatar
Mahidhar Venkata Araveti
Copper Contributor
May 08, 2018

Hi Dan,

 

It seems the solution you have suggested is working. But I want to know whether Microsoft is fixing this issue or going forward we need to use different authentication mechanisms

 

Regards,

Mahidhar

Daniel Colarossi's avatar
Daniel Colarossi
Brass Contributor
May 08, 2018
HI Mahidhar
I'm trying to chase up the same answer with Microsoft ( i dont work for them). Im chatting with their devs so as soon as i hear back ill post it here.

Thanks

Dan