http://192.168.2.20/blogs/doverton/archive/2009/02/26/sbs-2008-migrations-from-sbs-2003-keys-to-success-from-the-official-sbs-blog.aspxI started to write about this at SBS 2003 to SBS 2008 migration thoughts and issues and Active Directory Health Checks , but after some discussion with the SBS team at Microsoft we now have much more: The Official SBS Blog : SBS 2008 Migrations from SBSenCommunityServer 2008.5 SP2 (Build: 40407.4157)