FrontPage used to require a set of server-side plugins originally known as IIS Extensions. The extension set was significantly enhanced for Microsoft inclusion of FrontPage into the Microsoft Office line-up with Office 97 and subsequently renamed FrontPage Server Extensions (FPSE). Both sets of extensions needed to be installed on the target web server for its content and publishing features to work. Microsoft offered both Windows and Unix-based versions of FPSE. FrontPage 2000 Server Extensions worked with earlier versions of FrontPage as well. FPSE 2002 was the last released version which also works with FrontPage 2003 and was later updated for IIS 6.0 as well. However, with FrontPage 2003, Microsoft began moving away from proprietary Server Extensions to standard protocols like FTP and WebDAV for remote web publishing and authoring. FrontPage 2003 can also be used with Windows SharePoint Services.