More choices for Linux than for Windows (Score 1)

This is more fud in a way, there are several choices in linux; Kontact, Evolution and Thunderbird all offer much better email functionality than Outlook. Where there is a difference is in providing exchange functionality and that too exists on several fronts, Kolab, OpenExchange and Zimbra all provide Exchange functionality and Horde/Kolab and Zimbra both provide compelling web interfaces that are equal to what is provided by Exchange in terms of shared calendars and shared addressbooks. I think the only thing not provided yet is the ability for mail rules to be seamlessly migrated from the mailclient to the server so you don't have to setup your mailrules/filters twice. Thunderbird needs solid calendaring, this is true. This is probably the biggest problem out there because in doing windows to linux migrations you ALWAYS want to migrate them in a staged format by getting them onto the apps they will be using in linux while still having them on windows and thunderbird is the only one that is crossplatform. Unless you migrate them to web based solutions like Horde/Kolab or Zimbra. Personally i use Horde/Kontact and love it although i will admit Zimbra is pretty sweet looking having been done in AJAX. http://kolab.org/ http://zimbra.com/ http://www.openexchange.com/