FrontPage Server Extensions are server-side scripts that extend the functionality of FrontPage client. These extensions allow managing web site contents from Office FrontPage or Visual Studio.NET and support features such as hit counters, data collection, e-mail processing, and database processing.
To manage FrontPage Extensions open “FrontPage” tab on web site properties:
Specify FrontPage account name and its password then click “Install” button to enable FrontPage.
After FrontPage is enabled you could change account password or uninstall FrontPage extensions from the web site.
When installed FrontPage Extensions create special system folders in the root of web site, so make sure you do not delete them or edit manually: