Blocked file types in Outlook. If you use a Microsoft Exchange Server account and the Exchange Server administrator has configured your Outlook security settings, your administrator might be able to help you.

Learn how to use the INDIRECT function in Excel to dynamically adjust your cell references without changing your formula.

Many users find that using an external keyboard with keyboard shortcuts for PowerPoint helps them work more efficiently. For users with mobility or vision disabilities, keyboard shortcuts can be easier than using the touchscreen and are an essential alternative to using a mouse.

Learn what file name extensions are, which extensions are common in Windows, and how to view them in File Explorer.

Switch the format of email messages, which controls formatting options that are available such as colors, fonts, and tables.

Every member in Teams has a role, and each one has different permissions. Owners Team owners manage certain settings for the team. They add and remove members, add guests, change team settings, and handle administrative tasks.

Discusses the release of the Malicious Software Removal Tool (MSRT) to help remove specific prevalent malicious software from Windows-based computers.

Lists the file formats that are supported in Excel. The topic also includes a list of unsupported file formats and some suggested workarounds.

Add-ins provide optional commands and features for Microsoft Excel. By default, add-ins are not immediately available in Excel, so you must first install and (in some cases) activate these add-ins so that you can use them. Some add-ins are built in to Excel, such as Solver and the Analysis ToolPak. Some other add-ins are available from the Download Center, and must first be downloaded and ...

Focus is a new feature in Windows 11 that helps you minimize distractions. To help you stay on track, it integrates with the Clock app with features like a focus timer and music integration.