Can't remove old device from Microsoft account

This usually indicates a device sync or server-side issue rather than a problem with the old device itself.

Try this path:

1. Go back to the Microsoft account Devices page and try removing the device again from there.
2. If the device is already offline or no longer accessible, wait a few days and try again. Accepted Microsoft Q&A guidance indicates device management servers may not have finished syncing yet.
3. If the device still appears, sign out of Microsoft account sessions under account security settings, then retry the removal.
4. If the device is a personal Windows PC you no longer use, remove it from the Microsoft account Devices page:
   • Sign in to https://account.microsoft.com/devices
   • Find the device
   • Select Remove device
   • Confirm by checking the box and selecting Remove
5. If the goal is only to free Microsoft Store device slots, unlink it instead:
   • Sign in to https://account.microsoft.com/devices/content
   • Select the device
   • Choose Unlink

Important limits and conditions:

• It can take up to 24 hours for a registered device to appear on the list.
• A device may already be attached to another account.
• A company- or organization-managed PC cannot be registered to a personal Microsoft account.
• macOS and mobile devices cannot currently be added to the Microsoft account devices list.

If the error continues, use Microsoft Support from the account help page.

• Manage devices used with your Microsoft account
• Manage devices used with your Microsoft account
• Manage devices used with your Microsoft account
• How to remove device from Microsoft Account - Microsoft Q&A