Sharepoint online CSOM error

[spaieszambiacom]

Hello, 

I've been trying this simple CSOM code:

string siteCollectionUrl = "https://ieszambia.sharepoint.com/"; string userName = "email address removed for privacy reasons"; string password = "Put00745"; // Namespace: Microsoft.SharePoint.Client ClientContext ctx = new ClientContext(siteCollectionUrl); // Namespace: System.Security SecureString secureString = new SecureString(); password.ToList().ForEach(secureString.AppendChar); // Namespace: Microsoft.SharePoint.Client ctx.Credentials = new SharePointOnlineCredentials(userName, secureString); // Namespace: Microsoft.SharePoint.Client Site site = ctx.Site; ctx.Load(site); ctx.ExecuteQuery(); return View(site.Url.ToString());

and I keep getting the following error: the sign-in name or password does not match one in the microsoft account. 

Even though I can log into sharepoint using those same credentials. ITs driving me crazy, what am I doing wrong? 

[#2]

@spaieszambiacom If multi-factor authentication (MFA) is enabled for this user account, use M365 app password instead of normal password.

Check below threads for more information:

1. Use App Password to Authenticate with PowerShell PnP 
2. Connect-SPOService : The sign-in name or password does not match one in the Microsoft account system 

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[#3]

Hi ganeshsanap,

Thank you for your quick response. Thats thing. MFA is actually disabled. Thats why itsdriving me crazy. Do you have any other suggestions?

Kind Regards

[#4 · Accepted solution]

@spaieszambiacom 

Mhm.... i normally use the "PnP.Framework" Library and this code

SecureString securePassword = new NetworkCredential("", password).SecurePassword;

PnP.Framework.AuthenticationManager auth = new PnP.Framework.AuthenticationManager(username,securePassword);

ClientContext ctx = auth.GetContext(siteUrl);

[#5]

Thank you very very much. This as worked. You've saved me a great headache. Thank you