MFA Enabled User account not working in CSOM

Question

When trying an account that has Multi-Factor Authentication enabled, it's throwing error like this:

Is there any way to resolve this issue ?

Answer 1

Hi @g h ,

You can create a app password in the link below:

AppPasswords.aspx

Then you can connect to site using AppPassword like this:

Or you can use SharePointPnPCoreOnline assembly, this will pop up a login dialogue and make it available to use MFA Authentication:

Reference:

Using CSOM To Connect To A SharePoint Site With Multi Factor Authentication Enabled

Answer 2

Don't use App Passwords! That bypasses MFA. App Passwords should be disabled on your tenant.

Instead, use the Client ID/Secret model by registering your addin with SharePoint and granting it the proper permissions.

https://learn.microsoft.com/en-us/sharepoint/dev/sp-add-ins/add-in-permissions-in-sharepoint