A Microsoft file hosting and synchronization service.
Hi Mark,
The error code 0x8004de40 usually indicates that your computer can't be connected to the Microsoft OneDrive Server. So it's more likely a network issue in your PC.
Here are some solutions you may try to troubleshoot this issue:
1.Please check if you have any VPN or Proxy settings running on your device or router. If there is, please disable them.
2.Turn off your anti-virus software or network firewall on your PC.
3.Please try enable your mobile's hot spot, and connect your PC to your mobile's hot spot instead. See if the issue persist.
Also, please allow us to confirm some information with you:
1.Can you open the OneDrive and Teams in the web page?
2.Which account type are you using? Is it a Microsoft Personal Account or Business Work/School Account?
3.Please make sure your OneDrive is updated. Please click on OneDrive icon in the Tray > Settings > About to check your OneDrive version.
Regards,
Alex Chen