Outlook Error 0x80070021: How to Fix OneDrive File Lock Conflicts
You see error 0x80070021 when trying to save an email attachment or open a file from Outlook. This error means a file is locked by another process. The conflict often happens with files stored in OneDrive or SharePoint. This article explains how to resolve the lock and prevent the error. Key Takeaways: Resolving Outlook File … Read more