In Outlook, sometimes your outgoing messages get stuck in your outbox and just won't send. Learn about some ways to get them moving.

Learn how to create and use a VPN connection profile on Windows for secure and private internet access.

Learn how to change the power mode on your Windows PC to preserve your battery, limit notifications, and background activity.

Learn how to concatenate text strings in Excel using the CONCATENATE function. Our step-by-step guide makes it easy to join two or more text strings into one.

If you get an email about unusual activity on your Microsoft account, or if you’re worried that someone else might have used your account, go to the Recent activity page.You’ll see when your Microsoft account was signed in during the last 30 days, along with any device or app-specific info.

Learn about the UNIQUE function, which returns a list of unique values in a list or range. UNIQUE is in a class of functions called dynamic arrays.

Este solucionador de problemas ayuda a los clientes cuyos equipos aún no se han actualizado a la versión más reciente (1607) de Windows 10. Esta actualización se lanzará en un primer momento solo para un pequeño conjunto de clientes. Este conjunto se irá ampliando con el tiempo. Los usuarios de Windows pueden iniciar el asistente desde este artículo.

Use different themes and backgrounds to change the look and feel of Microsoft 365.

Learn how to identify a phishing scam, designed to steal money via fake emails.

Office または Microsoft 365 を購入したときにプロダクト キーが付属していた場合は、使用している製品に対応する以下の Web サイトのいずれかにプロダクト キーを入力します。