Want to add a padlock to your email messages? You can use S/MIME in Outlook on the web to increase the security of messages. A digitally encrypted message can only be opened by recipients who have the correct key.

Learn how to change Internet Explorer settings, or reset browser settings when there's a problem.

Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

Use Version History to view previous versions of files stored in OneDrive or SharePoint libraries.

Delete a security key from your security info. If you lose or no longer want to use a security key, you can delete the key from your security info.

With Power Query, you can search for data sources, make connections, and then shape that data (for example remove a column, change a data type, or merge tables) in ways that meet your needs. Once you’ve shaped your data, you can share your findings or use your query to create reports.

If you receive a message in Mail or Calendar for Windows 10 that your account settings are out of date, there are several things you can do to fix the problem.

Learn how to download new text-to-speech language and voices in Windows for Immersive Reader, Read Mode, and Read Aloud.

Add your Outlook.com, Microsoft 365, or Exchange-based email account to your iPhone, iPad, or iPod Touch using Outlook for iOS.

Need to uninstall Office for Mac? It's quick and easy. Just follow these simple steps.