Learn how to open MSG files without Outlook. Open MSG files for free using Zamzar online tool or SysTools MSG Viewer on Windows 11/10 PC.

If Excel Online is not working and you see errors Couldn't Open the Workbook, or Request Was Taking Too Long, then see this post for the fix.

Learn how to use a Microsoft 365 setting to choose whether to open files in the online or desktop app, giving you full control for each file.