>Thunderbird can do everything Outlook can (i.e. provide an email client, calendar and address book), but there is no official(ly supported) Thunderbird server

>Thunderbird can do everything Outlook can (i.e. provide an email client, calendar and address book), but there is no official(ly supported) Thunderbird server software suite so there's always a potential for subtle bugs between whatever one chooses for directory, email and calendar backends. Thunderbird is a lot more reliable than outlook - I use both daily. But yeah there's no 'thunderbird software suite'. I don't think that's really an issue though. Outlook breaks regularly, and our desktop support group had to deploy an 'outlook reset' app because the vendor is unresponsive. Being that unresponsive lessens the attractiveness of a 'software suite'. >Or hell, even compatibility with old versions of the same app isn't a given in LibreOffice. If I find MS word can't open a file, Libreoffice always does. I've never had a problem opening a libreoffice writer or MS Word file. I'm no 'power user' though. The reason businesses and organizations stick to microsoft is because it's what they're used to, not because the apps themselves are better. As for microsoft as a vendor - they are as obtuse a vendor as I've ever dealt with. Nearly always 100% unresponsive - even with projects involving hundreds of thousands of yearly dollars in licensing fees. I think being unresponsive is some kind of corporate culture thing with them. They're like the McDonalds of IT vendors. You get what's on the menu and that's it. If it doesn't work, well too bad because they know the perceived cost of switching is believed to be too high.