Hkey_current_user\software\microsoft\office\16.0\common\identity

The registry key HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity is a central location for managing on Windows. It is commonly modified to fix persistent sign-in loops, password prompt errors, and issues with "Modern Authentication" (ADAL). Common Fixes Using This Registry Key

When functioning correctly, the Identity key is a masterpiece of invisible engineering. password prompt errors

Get-ItemProperty -Path "HKCU:\Software\Microsoft\Office\16.0\Common\Identity" -Name "LastLoggedInUser" -ErrorAction SilentlyContinue password prompt errors

You likely need to modify this key if you encounter the following, particularly in shared device scenarios or RDS (Remote Desktop Services) environments: 1. Constant Credential Prompts / "Need Password" password prompt errors

Corrupted identity cache, expired token, or group policy blocking modern auth.

Right-click the Identity folder and rename it to Identity.old . Restart: Restart your computer.