I am upgrading Office Home and Business 2010 to Office Professional Plus 2010 for the sole purpose to get the Email Archiving feature within Exchange 2010. I wanted to totally uninstall Office Home and Business 2010 and then do a fresh install of Office Pro Plus 2010. I have to do this for about 75 users and wanted to make this transition as smooth as possible for all users (I am upgrading all users on the same pc they are currently using). Do I need to transfer/backup the .dic file, the autocomplete file, and anything else? If I do can you please list what I need to transfer/backup. Or is this done automatically for me?