Glen Scales

Glen Scales is a Microsoft MVP and senior developer based on the Sunshine Coast, Australia, specializing in Exchange, Active Directory, Office 365, and Teams. He's been blogging about mail development and Exchange since 2004 — over 20 years of hands-on, in-the-trenches technical writing that has become essential reading for anyone building on Microsoft's messaging platform.

Glen's expertise runs deep across every Exchange programming model — from the early days of CDO and WebDAV through Exchange Web Services to the Microsoft Graph API. His blog posts and code samples don't just explain how things *should* work; they map out the undocumented corners, the gray areas, and the practical workarounds that only surface when you're building real solutions. Whether it's sending MIME messages via Graph, migrating directory access code from EWS, or navigating large attachment uploads, Glen has been there first and written the guide.

He shares his tools and PowerShell libraries openly on GitHub, is a trusted voice on Stack Overflow with over one thousand answers, and now publishes his latest work on his [eMail Development Substack](https://glenscales.substack.com/). If you've ever searched for an answer to an Exchange development question, chances are Glen's work pointed you in the right direction.