Identity Client Runtime Library did not get response from the Login Server when tried to connect to SharePoint programmatically

Question

Identity Client Runtime Library did not get response from the Login Server when tried to connect to SharePoint programmatically

Valeriia Kalynenko 5

Hi all, I am currently using net6.0 application to 
upload files to SharePoint site. I use nuget package SharePointOnline.Portable to perform this. 



Code sample is below:


           using var clientContext = new ClientContext(sharePointSiteUrl); // https://xxx.sharepoint.com/sites/MySite

           clientContext.Credentials = new SharePointOnlineCredentials(sharePointUserEmail, sharePointUserPassword); 

           var webContext = clientContext.Web;
           clientContext.Load(webContext, web => web.ServerRelativeUrl);
           await clientContext.ExecuteQueryAsync();



This flow worked one week ago, but now I receive an authorization error. 
Tried to use another libraries, which have almost the same syntax, 
but error Identity Client Runtime Library did not get response from 
the Login Server did not disappear. Last my step was attempt to connect via SharePoint.PowerShell, unfortunately, the result was exactly the same.

Does someone know the reasons why it is not working now? 
I would be really grateful for any help.

Thanks

Answer 1

RaytheonXie_MSFT 19,881 Microsoft Vendor

Hi @Valeriia Kalynenko ,

Since your code worked well before, there might something error with your account. Please check the following steps

Check the permission to the the site. You can refer to the article .
Check if the tenant have enabled MFA. You can refer to the document Set up multifactor authentication for Microsoft 365

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RaytheonXie_MSFT 19,881 Reputation points Microsoft Vendor

2023-05-05T09:22:42.09+00:00

Hi @Valeriia Kalynenko ,

Did the answer help you? If there's anything you'd like to know, don't hesitate to ask.
Valeriia Kalynenko 5 Reputation points

2023-05-05T09:41:39.86+00:00

Hi @RaytheonXie_MSFT ,

Thank you for attending my question.

I have checked my permissions, I am in Owners group, which has full access, but I found that I have also been added to group "Limited Access System Group For Web". It has been done automatically, I suppose. I removed myself from this group and checked again, error was the same.

Do you know any possible cases why I started receiving this error?

Thanks in advance.

Regards,

Valeriia
RaytheonXie_MSFT 19,881 Reputation points Microsoft Vendor

2023-05-08T09:24:18.9133333+00:00

Hi @Valeriia Kalynenko ,

Limited Access as Enables a user or group to browse to a site page or library to access a specific content item when they do not have permissions to open or edit any other items in the site or library. This level is automatically assigned by SharePoint when you provide access to one specific item. You could log in sharepoint with the account and password by browser, and check if there is a MFA authentication when you log in.
Valeriia Kalynenko 5 Reputation points

2023-05-09T07:15:49.3866667+00:00

Hi @RaytheonXie_MSFT ,

I tried to log in with incognito page, but MFA did not appear.

What else solutions can you recommend?

I appreciate your help.

Thanks

RaytheonXie_MSFT 19,881 Microsoft Vendor

Hi @Valeriia Kalynenko ,

Per my research, you might try the modern authentication with csom for .net. Please refer to the following code.

public static async Task Main(string[] args)
{
    Uri site = new Uri("https://contoso.sharepoint.com/sites/siteA");
    string user = "joe.doe@contoso.onmicrosoft.com";
    SecureString password = GetSecureString($"Password for {user}");

    // Note: The PnP Sites Core AuthenticationManager class also supports this
    using (var authenticationManager = new AuthenticationManager())
    using (var context = authenticationManager.GetContext(site, user, password))
    {
        context.Load(context.Web, p => p.Title);
        await context.ExecuteQueryAsync();
        Console.WriteLine($"Title: {context.Web.Title}");
    }
}

and here is the document for more details

https://learn.microsoft.com/en-us/sharepoint/dev/sp-add-ins/using-csom-for-dotnet-standard#console-app-sample

Identity Client Runtime Library did not get response from the Login Server when tried to connect to SharePoint programmatically

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