How to turn on dark mode in Microsoft Outlook to change your display and reduce eye strain

To turn on dark mode in Outlook, click the File tab, choose Office Account, and set the Office Theme to black.

How to export contacts from Outlook to backup your contact information, or add it to other programs

To export contacts from Microsoft Outlook, you'll need to use Outlook's "Export to a file" feature, which is built-in.
Infosecurity-magazine.com

How to Manage Large PST Files in Microsoft Outlook

Microsoft Outlook is used by millions of users worldwide for personal and business communication. It stores all the data in a PST file when configured with POP3 account. However, as email usage grows ...
Houston Chronicle

Outlook 2007 Is Always Checking Data File When I Open It

Your Outlook Data File is composed of a file header, located at the beginning of the document, and the actual data that makes up your personal folders. Contained in the header is information about the ...