Tony Redmond
Tony Redmond has been working with Microsoft server technology since NT 3.1. He's written ten books on Exchange Server, including the "Inside Out" book on Exchange 2013 (Mailbox and High Availability) that appeared in October 2013. His latest venture is the "Office 365 for IT Pros" eBook (https://office365itpros.com), which covers all aspects of the Microsoft 365 ecosystem. The eBook is updated monthly to take account of changes within the service and has been hailed as a unique approach to technical documentation. The eBook is now in its 10th edition (https://gum.co/O365IT/).
In addition, he has written literally hundreds of articles about different aspects of Exchange and has spoken at conferences such as Ignite, TechEd, MEC, ESPC, M365 Conference, Exchange Connections, and HP's Technology Forum. Tony writes regularly about many aspects of Microsoft 365 at Practical365,com and Office365ITPros.com.