I can't sign in to One Drive on my PC

Since OneDrive works online and on other devices, the account itself is likely fine and the problem is isolated to the local sign-in state on that work PC.

Try these steps in this order:

1. Verify the correct account type is being used
   • If this is a work or school OneDrive, sign in with the work/school Entra ID account, not a personal Microsoft account.
   • If the sign-in page shows errors such as "Selected user account does not exist in tenant 'Microsoft Services'" or access to onedrive.cloud.microsoft fails, that usually means the wrong account type is being used.
2. Check whether network filtering on the PC is blocking sign-in
   • Since web access works elsewhere, the work PC may be affected by firewall, VPN, or ISP/network filtering.
   • Temporarily disconnect VPN if one is enabled.
   • If possible, test sign-in from a different network such as a mobile hotspot. If sign-in works there, the issue is likely network filtering.
3. Clear cached identity data that can survive reinstall
   • Sign out of OneDrive.
   • Delete all folders in:
     • %localappdata%/Microsoft/OneAuth
     • %localappdata%/Microsoft/IdentityCache
   • Then start OneDrive and try signing in again.
4. Remove cached Office identities from the registry
   • This is specifically recommended for authentication issues caused by multiple cached identities.
   • Warning: Incorrect registry changes can cause serious problems. Back up the registry first.
   • Open Registry Editor.
   • Delete this key:
     • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\Identity
   • If Shared Computer Activation is enabled, also remove:
     • HKEY_USERS\<user_SID>\SOFTWARE\Microsoft\Office\16.0\Common\Identity
   • To get the current user SID, run:
     • whoami /user
5. If the PC has had old or different OneDrive accounts connected, unlink and relink OneDrive
   • If an old account was previously added, unlink the PC from that account and relink using the correct work account.
6. If sign-in still fails, do a full local cleanup and reinstall
   • Uninstall OneDrive from Settings > Apps > Installed apps or Add or remove programs.
   • Reinstall the latest OneDrive app.
   • Reopen it and complete sign-in again.
   • Microsoft notes that uninstalling and reinstalling OneDrive does not remove files or data.
7. If the issue is only on the work PC after all local cleanup
   • Contact the organization’s IT helpdesk or admin, especially if the correct work account is being used and the problem persists only on that managed device.

• Can't sign in to OneDrive | Microsoft Support
• Error 0x8004dec5 when signing in to OneDrive
• Error 0x8004de80 or 0x8004de86 when signing in to OneDrive
• Fixes or workarounds for recent issues in OneDrive