I&#x27;m saddened because the only thing holding me back from using Linux full time at work is the lack of a good calendar and e-mail application.<p>Of course thunderbird is insufficient for me who rely on Microsoft Exchange at work but it could still be a contender to Evolution given the right development focus.<p>Evolution, the number one alternative I know of today, has had shaky EWS support from day one and in Fedora 23 on my personal laptop it&#x27;s still not fully resolved. Also I find its calendar option quite hideous actually, it tries to mimic Outlook but that&#x27;s not a good thing imho. The best calendar I&#x27;ve used is Calendar.app on Mac OS.<p>Of course you can&#x27;t blame anyone but us, the community. The one EWS plugin for Thunderbird is pay-2-play and the one for Evolution is the one having all the issues. So either Microsoft is hard to develop for or demand isn&#x27;t high enough.