Microsoft Office 365 sign in issues

A quickie, today I had a user on Windows 10 and Office 365, not able to sign into any 365 apps. The credentials were fine, entering the username and password into Word, Excel or Outlook would accept the credentials, wait, then fail to log in with no errors or messages output to screen or eventlog. Other users on the same machine, different user profile were fine. Fixed it by adding following registry key and rebooting the workstation.
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity] "EnableADAL"=dword:00000000

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