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.

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.

If your online mailbox is nearly full, you can export some items to an Outlook Data File (.pst). You can also use these files to create archives, project files, or backups from any Outlook account. To learn how, see Export or backup email, contacts, and calendar to an Outlook .pst file.

Microsoft Outlook 2016, Outlook 2013, Outlook 2010, Outlook 2007, and Outlook 2003 support American National Standards Institute (ANSI) and UNICODE personal folders (.pst) and offline folder (.ost) files. This article describes how to use the following four registry entries to limit the size of both the .pst and the .ost files: The MaxFileSize ...

Save a message as a file on your computer or in the cloud. In Mail, from the message list, select the message you want to save so it opens in the reading pane, or double-click the message to open to open it in a new window. From the message header, select More actions > Save as.

One of the most common ways of transmitting computer viruses is through file attachments. To help protect you and your recipients against computer viruses, Outlook blocks the sending and receiving of certain types of files (such as .exe and certain database files) as attachments.

A factor in authentication is a way of confirming your identity when you try to sign in. For example, a password is one kind of factor, it's a thing you know. The three most common kinds of factors are: Something you know - Like a password, or a memorized PIN.

To edit a PDF, open it in Word. This works best with PDFs that are mostly text. PDFs of book chapters or something that looks like a manuscript from a copier won't be formatted well in Word. Go to File > Open. Find the PDF and open it (you might have to select Browse and find the PDF in a folder).

Outlook accounts can have up to 100GB of storage per mailbox ( Exchange Online mailbox storage limits ). Administrators can reduce maximum mailbox sizes per user or globally, see: How to set Exchange Online mailbox sizes and limits in the Microsoft 365 environment for details.

You can use the Office programs to save or convert your files to PDFs so that you can share them or print them using commercial printers. And you won’t need any other software or add-ins.