CSOM PowerShell script - moving to modern authentication

Question

I have a complex CSOM script that I need to get working for a Tenant that uses Modern Authentication.

This works fine using Basic Authentication. Its not an automated script so an interactive login is fine.

$Cred = Get-Credential
$Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
$Ctx.Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.UserName, $Cred.Password)  
... do rest of script...

Any idea how I change this to use modern authentication? Even temporaily switching off MFA still wont work.

I can log in fine using the credentials to the SP site.

Many thanks!

Answer 1

If you are using the old SharePoint dlls. Make sure you install or are using the last PnP powershell library.

• https://pnp.github.io/powershell/

Then you can use the following code to prompt the MFA connection:

Connect-PnPOnline -Url $siteUrl –UseWebLogin
$context = Get-PnPContext

$web = $context.web
$context.load($web)
$context.ExecuteQuery()