Hkey-current-user Software Microsoft Office 16.0 Common Identity Instant

If you use FSLogix Profile Containers for Office 365, ensure your RedirXML includes:

: Forces Office to use Legacy/Basic Authentication. DisableADALatopWAMOverride : If you use FSLogix Profile Containers for Office

@echo off echo Closing Office applications... taskkill /f /im winword.exe taskkill /f /im excel.exe taskkill /f /im outlook.exe echo Removing Identity registry key... reg delete "HKCU\Software\Microsoft\Office\16.0\Common\Identity" /f echo Reset complete. Please restart Office. pause If you use FSLogix Profile Containers for Office

In many troubleshooting scenarios, especially when transitioning from on-premises Exchange to Exchange Online, users encounter repeated prompts for credentials that never succeed. This is often because Office defaults to legacy authentication protocols. If you use FSLogix Profile Containers for Office