Learn how to update Microsoft Office on PC and troubleshooting tips for installing Office updates.

For POP and IMAP accounts, you might store your Outlook items in an Outlook Data File (.pst). If you want to open or close an Outlook Data File (.pst), you can do that in a few simple steps.

When you add an email account to Outlook, a local copy of your information is stored on your computer. This feature allows you to access your previously downloaded or synchronized email messages, calendar information, contacts, and tasks without an internet connection.

When you add an email account to Outlook, a local copy of your information is stored on your computer. This feature allows you to access your previously downloaded or synchronized email messages, calendar information, contacts, and tasks without an internet connection.

The new Outlook for Windows brings you the latest features, Microsoft Copilot-assisted capabilities, and a new modern and simplified design to help you connect, organize, and get things done.

Outlook Data Files (.ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode. This type of data file is also used for accounts that you set up with the Outlook Connector for Outlook.com (formerly Hotmail).

Copilot is available in the Home tab of Word, Excel, PowerPoint, and Outlook on the web if you are a Copilot subscriber. If you also have a Microsoft 365 subscription that includes the Microsoft 365 desktop apps then you should find Copilot available in those apps as well.

To find the Teams Meeting add-in, open Outlook, switch to the Calendar view, and then select New Teams Meeting. Download and run the Microsoft Support and Recovery Assistant to perform automated troubleshooting steps and fixes.

Starts Word and opens an existing XML document based on the specified Extensible Stylesheet Language Transformation (XSLT). Starts Word and prevents add-ins and global templates (including the Normal template) from being loaded automatically. The /a switch also locks the setting files.

Go to Review > Track Changes. When Track Changes is on, the section is highlighted. Deletions are marked with a strikethrough, and additions are marked with an underline. Different authors' changes are indicated with different colors. When Track Changes is off, the section is not highlighted.