.GROUP File Extension
File TypeWindows Contacts Group File
What is a GROUP file?
Collection of contacts created by Windows Contacts, an embedded contact management program included with Windows; contains a list of contacts saved into a group; can be used to create a mailing list for sending email messages to multiple addresses at once.
GROUP files can be created within Windows Contacts by selecting the "New Contact Group" option from the toolbar. Once the group has been created, you can add contacts by clicking the "Add to Contact Group" button and selecting individual .CONTACT files or other GROUP files. You may also create and add new contacts directly within the New Contact Group window.