Outlook address book is a compilation of various address books and mailing lists, including the "Contacts" folder, Personal Address Book files (.pab), Internet LDAP directories, the Global Address List (GAL) from Microsoft Exchange Server, and more.
Keep in mind that Outlook settings vary depending on the operating system, with different files responsible for specific settings stored in separate locations (for example, fonts are saved in a unique folder).
The primary data file for Outlook is the PST file, which contains emails, calendars, contacts, tasks, and notes. Outlook is required to access and manage items in PST files. By default, the PST file is stored at: C:\Documents and Settings\User\Local Settings\Application Data\Microsoft\Outlook
The Outlook address book location on a PC for Outlook 2021 and Outlook 2024 typically indicates where your Outlook data files, including contacts, are stored.
Generally, these files are located in a PST format within your user directory under: Documents\Outlook Files on Windows 10 and Windows 11. However, the actual path may vary depending on your installation and configuration.
If you're looking to back up your Outlook 2010 address book, check for .PST files on your computer, typically found in:
Documents\Outlook Files or My Documents\Outlook Files.
If you upgrade to Outlook 2010, any data files created in previous versions of Outlook will be saved in a different location within a hidden folder:
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How can you copy the Outlook address book? Since the PST file is a straightforward file format, you can easily copy the PST file from the folder where your Outlook address book is stored. Additionally, you can download the Outlook address book (as a .pst file) and open it in Outlook.
Learn more about PST File Backup
You can easily export Outlook Address Book using its built-in Import and Export feature.
Learn more: