Notes about the VFB file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The VFB file type is primarily associated with 'Outlook' by Microsoft Corporation.
Internet Free/Busy (IFB) is a feature of Microsoft Outlook that allows you to see when others are free or busy so that you can efficiently schedule meetings.