All Outlook Data Files (.pst) and Offline Data Files (.ost) are listed along with the name of the account the files are associated with. If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

For Microsoft 365, Exchange, and Outlook.com accounts, all of your information is stored on the server, but an offline copy is also stored on your local computer in an Offline Outlook Data File (.ost). For POP and IMAP accounts, you might store your Outlook items in an Outlook Data File (.pst).

This feature allows you to access your previously downloaded or synchronized email messages, calendar information, contacts, and tasks without an internet connection. Certain types of accounts, such as POP accounts, store their information in the Outlook Data File (.pst) format.

This feature allows you to access your previously downloaded or synchronized email messages, calendar information, contacts, and tasks without an internet connection. Certain types of accounts, such as POP accounts, store their information in Outlook Data Files ( .pst files).

To reduce the size of your Outlook Data File (.pst) or Offline Outlook Data File (.ost), you can manually compact the data file. Select your version of Outlook below to see instructions on how to reduce the size of a .pst or .ost file.

Use the Microsoft Authenticator app to sign in securely without a password. Learn why you received a notification about unusual activity in your account and what to do next.

See plans and pricing. Find help and support content for Microsoft Phone Link. Learn time-saving tips and explore how you can use Phone Link to stay productive.

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A website or document may have damaged graphics, fonts, or code that can be the cause of the print issue. Test to see if Microsoft Edge is printing properly for other websites or documents: Open a website or online document other than the one you're unable to print.

To capture someone's attention in an email or meeting invite, type the @ symbol followed by their name within the message or invite. Doing so will highlight their name and prompt Outlook to add them to the To line, ensuring they notice, and add the @ symbol next to their message in the Inbox.