Thomas Stensitzki is a Principal Technology Consultant and owner of Granikos GmbH & Co. KG, a company specializing in enterprise consulting and training for Microsoft Exchange, Microsoft 365, and hybrid collaboration environments. He has held the Microsoft MVP award for Microsoft 365 and Exchange since April 2018 and is certified as both a Microsoft Certified Solutions Master Messaging and a Microsoft Certified Master for Exchange Server — among the most advanced technical certifications Microsoft has ever offered. As a Microsoft Certified Trainer and former MCT Community Lead, Thomas has trained IT professionals across Europe and contributed to the broader Microsoft training community for years. He is the author of several books, including the widely used "Exchange Server – Das Handbuch für Administratoren," and is a sought-after speaker at events such as Exchange Summit, Experts Live, and Scottish Summit. In addition to his consulting work, Thomas runs the podcast "Exchange Unplugged" and regularly shares his expertise through his YouTube channel, blog, and community meetups.