There were two main database limitations in MDT 2008 Update 1: We didn’t add any new “settings” columns – the list of available settings was still the same as it was originally in BDD 2007. To add new columns to the database and to have them show up in
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Read the complete post at http://blogs.technet.com/mniehaus/archive/2009/07/03/mdt-2010-new-feature-14-database-improvements.aspx