Siegfried Jagott is a Principal Consultant and Team Lead for the Messaging and Collaboration team at Allgeier Productivity Solutions Germany. He is a Microsoft Valuable Professional (MVP) for Exchange, an award-winning author of Microsoft Exchange Server 2010 Best Practices (Microsoft Press), and has been writing and technical reviewing for several Microsoft Official Curriculum (MOC) courses on various topics such as MOC 20341 Core Solutions of Microsoft Exchange Server 2013. He has co-authored various books on Windows Server, System Center Virtual Machine Manager, and Exchange. Siegfried is a frequent speaker at international conferences such as Microsoft Exchange Conference 2014, Microsoft TechEd 2013 (New Orleans and Madrid), and IT/Dev Connections. He has planned, designed, and implemented some of the world's largest Windows and Exchange Server infrastructures for international customers, and currently focusses on global Office 365 implementations. He received an MBA from Open University in England and is a Microsoft Certified Systems Engineer (MCSE) since 1997.