Learn how to switch out of S mode to install apps from outside of the Microsoft Store or to upgrade to Windows 11.

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

Compose a message now, but schedule it to be sent later.

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

Create an alias to give you an additional email address which uses the same inbox, contact list, and account settings as your primary email address in Outlook.com.

Use the XLOOKUP function when you need to find things in a table or a range by row. For example, look up the price of an automotive part by the part number, or find an employee name based on their employee ID. With XLOOKUP, you can look in one column for a search term, and return a result from the same row in another column, regardless of which side the return column is on.

Learn how to download, install, and use the PC Health Check app to check your device's compatibility with Windows 11 and get tips to improve its performance.

Learn how to use and install mobile apps on your Windows 11 PC with the Windows Subsystem for Android™.

Use your Microsoft account to sign in to Microsoft services like Windows, Microsoft 365, OneDrive, Skype, Outlook, and Xbox Live.

How to use the SUMIF function in Excel to add the values in a range that meet criteria that you specify.