Anyone having issues with SharePoint Designer not authenticating?

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Recently, we've started to experience a problem with SharePoint Designer where we cannot connect to a SharePoint Site. It attempts to login and prompts you for your Windows credentials repeatedly. 

However, we found that if you use IE and connect via the "classic" menu and open in SharePoint Designer it appears to establish a connection and from then on it appears to happily allow connection.


Has anybody else experienced this lately? 

2 Replies

Can you try re-enable modern authentication by following this article and see if it helps.