About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Learn how to troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.

Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

Learn new and useful keyboard features, tips, and tricks for Windows with this overview from Microsoft Support.

Learn about file sharing over a network in Windows. Note: This article focuses on how to share files or folders over a Local Area Network (or LAN), such as connected computers within your home or workplace.If you are trying to find out how to share a file over the Internet, for example with a friend or family member, OneDrive provides easy ways to accomplish this.

Experience Microsoft Copilot on windows devices using the Copilot app! The Copilot app helps you get answers and inspiration from across the web, supports creativity and collaboration, and helps you focus on the task at hand.

Learn how to add Teams meetings to Outlook calendar using our step-by-step guide. Say goodbye to scheduling headaches and hello to seamless collaboration!

Learn how to recover deleted items, such as email, contacts, calendar appointments, and tasks in Outlook.

Get help with using mail, calendar, and contacts on Outlook.com.

If you need help with Outlook.com, you can read our self-help content, or get support via email.