MB-820 Exam Cram
Install and Upgrade Codeunits
Master the art of seamless extension lifecycle management in Business Central! This guide unlocks the secrets of Install and Upgrade Codeunits—from preventing data corruption with Upgrade Tags to achieving lightning-fast migrations with DataTransfer. Learn from real Microsoft code examples, avoid common pitfalls, and gain the confidence to handle any installation or upgrade scenario. Whether you're preparing for MB-820 certification or building production-ready extensions, this is your roadmap from junior developer to extension lifecycle expert.
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About the Book
This comprehensive guide provides an in-depth exploration of Install and Upgrade Codeunits in Microsoft Dynamics 365 Business Central, specifically designed to help junior developers master these critical extension lifecycle management concepts for the MB-820 certification exam. The guide systematically covers both Install Codeunits (which execute during first-time installations and reinstallations) and Upgrade Codeunits (which handle data migration between extension versions), explaining their respective triggers, execution contexts, and best practices through real-world examples extracted directly from the Business Central Base Application. Special emphasis is placed on the Upgrade Tags pattern—a three-codeunit approach that prevents duplicate execution of upgrade code—along with advanced topics including the DataTransfer object for performance optimization, ModuleInfo for version detection, ExecutionContext for protecting sensitive operations, and debugging techniques for troubleshooting installation and upgrade scenarios. Each concept is reinforced with practical code examples from Microsoft's own implementations (E-Document, VAT Group, and No. Series modules), common problem-solving scenarios, and targeted MB-820 exam preparation materials including key concepts to memorize, practice questions with answers, and a summary of critical best practices for professional Business Central development.
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About the Author
Silviu Virlan is a Microsoft MVP for Business Applications (awarded multiple times), MCT (Microsoft Certified Trainer), and MCP (MB-800, MB-820) and a highly respected Dynamics 365 Business Central expert. With over 12 years of hands-on experience in Dynamics NAV and Business Central, Silviu specializes in AL development, extensions, integrations, performance optimization, and modern AI-driven analytics. He served as a Technical Architect and Lead Developer for various Microsoft Business Central partners. Since 2017, Silviu has been a dedicated contributor to the global Business Central community. He shares practical knowledge and deep technical insights through:
- His popular blog at www.svirlan.com, featuring tutorials, release wave overviews, and best practices.
- The Business Central Musings YouTube channel (@BusinessCentralMusings), home to well-received educational series such as:
- "Let's pass MB-820" – a comprehensive certification prep playlist
- "What's new in Business Central" – covering 2023, 2024, 2025, and beyond release waves
In 2024, Silviu authored the book "Beyond the Ledgers: Cutting-edge Data Insights with Business Central and AI", a practical guide that helps users and developers unlock powerful analytics, automation, and AI capabilities within Business Central.
A sought-after speaker, you can often find Silviu presenting at major technical conferences including Directions, DynamicsCon, and Community Summit, where he delivers sessions on cutting-edge Business Central topics, from AL language features to advanced integrations and user experience enhancements.
Through his content, speaking engagements, and community leadership, Silviu continues to empower developers, consultants, and partners to build better solutions in the ever-evolving world of Dynamics 365 Business Central.
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