Outlook express was replaced by windows live mail, real-deal outlook is what every business in the world uses. It does minimize to the tray, not sure about themes I never tried because idc what my software looks like. I can tell you that the only difference between 2010 and 2013 is the appearance, 2013 decolorized all the icons and everything because minimalism has been the flavor of the month since ios7 came out and microsoft can't resist any opportunity to follow apple's lead

Outlook comes with Office pro or above I'd get this one because it has a corporate key and doesn't require an activation hack
http://kickass.to/microsoft-office-p...-t7133821.html