Extensions, or add-ons, are simple tools that customize your browser experience and offer you more control. Here's how to add, turn off, and remove them in Microsoft Edge .

Warning: Excel provides the DATEDIF function in order to support older workbooks from Lotus 1-2-3.The DATEDIF function may calculate incorrect results under certain scenarios. Please see the known issues section of this article for further details.

Learn how to use your Windows PC as a mobile hotspot. Turn your Windows PC into a mobile hotspot by sharing your internet connection with other devices over Wi-Fi.

If either of the categories above apply to you, use the following procedures to update your browser: Update once. In the browser, go to Settings and more > Help and feedback > About Microsoft Edge (edge://settings/help).. If the About page shows Microsoft Edge is up to date., you don't need to do anything.

Find out how to view your system information on Microsoft Support, including hardware and operating system details.

Use the People page in Outlook.com to view, create, and edit contacts and contact lists. Create new contacts from scratch, or add someone as a contact from an email message.

Access, download, or run the Surface app and the Surface Diagnostic Toolkit to help find and solve Surface problems.

Create a top-level folder in new Outlook. In the folder pane on the left, right-click your email address, or hover over it and select More options > Create new folder.

The files you store on a SharePoint site are usually available to everyone with permissions to the site, but you may want to share specific files or folders with people who don't otherwise have access to the site.

Get the steps for how to add a site to your favorites in Microsoft Edge for Windows 10 and Mac.