This feature was added with Expression 3 Service Pack 1.The version of Expression Encoder Pro 4 available as part of Expression Studio in programs like Dream Spark, Biz Spark, Website Spark and through MSDN Ultimate does not include royalty incurring codec and standards support for exporting in MP4 format (H.264 video and AAC audio).
Microsoft introduced Microsoft Expression on September 16, 2005, at Microsoft's Professional Developers Conference in Los Angeles.
Microsoft Expression Encoder was introduced at NAB 2007.
Microsoft Expression Studio was released to manufacturing (RTM) on April 30, 2007.
The RTM news was announced at Microsoft's MIX 07 conference for web developers and designers.
Microsoft Expression Studio 2 was released on May 1, 2008, which also included a graphical makeover for the suite to an inverse of the previous black-on-white theme.
This release brings all products in the suite to version 2, and now also includes Visual Studio Standard 2008.
Microsoft Expression Studio is also available to students as downloads via Microsoft's Dream Spark program.
Microsoft Expression Studio 3 was released on July 22, 2009, This release brings all products in the suite to version 3, with significant improvements especially targeting Silverlight 3.
Expression Media is no longer a part of package, while all other products have been significantly improved and enriched. Expression Studio 4 is a free upgrade version for licensed Expression Studio 3 users, but only for retail copies.
On December 20, 2012, Microsoft announced that the Expression products would be deprecated, with Blend becoming a standalone tool with Visual Studio 2012 Update 2, Expression Studio 4 Ultimate and Expression Studio 4 Web Professional no longer available for sale but supported through their support lifecycle, Expression Design 4 and Expression Web 4 available as unsupported free editions, Expression Encoder 4 Pro available for purchase through 2013, Expression Encoder 4 remains available for download at no charge.
As of version 4, there are two editions of Expression Studio available to general public: Web Professional and Ultimate Expression Studio Web Professional consists of: Prior to version 3, the suite also consisted of Microsoft Expression Media, a digital asset management application sold to Phase One.