Dave Stork started his Exchange career with Exchange 2003 and that version got him hooked. He blogs (https://dirteam.com/dave) and tweets (https://twitter.com/dmstork) about Exchange and other relevant topics for several years now and in time has expanded this community work with contributing to podcasts, speaking at several events and user group meetings in and outside his native Netherlands. He poured most of his knowledge and experience into the Practical PowerShell Exchange Server 2016 book last year. Now he is expanding his skills with reviewing this Exchange Online book. He is also an Exchange/Office Servers and Services MVP since 2014.