Client-server architecture is one of those computing ideas that sounds old-fashioned until you notice that most modern applications still depend on it. A browser asks a web service for a page or API response. A mobile app requests account data. A desktop client authenticates against an identity service. A point-of-sale terminal sends a transaction to a backend. The interfaces and deployment platforms have changed, but the basic relationship remains: one component requests a service and another component provides it. What has evolved is everything around that exchange. Modern servers may…

AI-102 is retired. Microsoft ended the Azure AI Engineer Associate exam on June 30, 2026 and replaced it with Azure AI Apps and Agents Developer Associate, measured by Microsoft AI-103. Candidates looking to become an Azure AI engineer in late 2026 should therefore build their plan around the current role rather than continue following an AI-102 preparation manual. The AI-103 exam focuses on planning and managing Azure AI solutions, generative AI and agentic solutions, computer vision, text analysis, and information extraction. Microsoft describes the candidate as an Azure AI engineer…

MB-220, Microsoft Dynamics 365 Marketing Functional Consultant, is no longer an active Microsoft certification exam. Microsoft retired MB-220 on November 30, 2024, after the Dynamics 365 Marketing product and credential path had already begun moving toward the Customer Insights branding. That makes older “how to pass MB-220” articles risky if they still present the exam as schedulable. The underlying product skills remain useful. Dynamics 365 Customer Insights – Journeys continues to support customer journeys, email, forms, segments, consent, events, analytics, and real-time engagement. The certification path, however, changed more than…

MB-220 is no longer an active Microsoft exam, but much of the work it once represented has not disappeared. Microsoft retired MB-220 on November 30, 2024, ending the Dynamics 365 Marketing Functional Consultant Associate exam path. A later customer-experience exam, MB-280, also retired in July 2026. For professionals maintaining older study material, the useful question is therefore not how to pass MB-220 today, but which skills still map to current Dynamics 365 Customer Insights – Journeys work. That distinction prevents an easy mistake. The historical MB-220 exam remains useful as…

Microsoft Dynamics 365 does not have a single product called “the ERP.” Its enterprise resource planning capabilities are spread across several applications designed for different organization sizes and business processes. Dynamics 365 Finance, Supply Chain Management, Commerce, Human Resources, and Project Operations form the finance-and-operations family, while Dynamics 365 Business Central provides a broad ERP platform for many small and mid-sized organizations. That distinction matters because an ERP selection should follow the operating model, not the brand name. A multinational manufacturer with complex warehousing and legal entities has different requirements…

MB-910 and the Microsoft Certified: Dynamics 365 Fundamentals (CRM) credential are retired. If you are finding old study plans that still tell beginners to schedule MB-910, do not build your certification strategy around that exam. The useful part of the old syllabus was the CRM foundation: understanding customer data, sales, customer service, marketing/customer journeys, Dataverse, automation, reporting, and the relationship between Dynamics 365 and Power Platform. Those skills still matter, but Microsoft now validates them through more role-specific and solution-specific paths. The historical MB-910 exam can still explain what the…

The DP-420 exam is not retiring, but it is changing meaningfully. Microsoft has announced that on October 6, 2026 the certification will change from Azure Cosmos DB Developer Specialty to Azure Cosmos DB AI Developer Associate. The exam code stays DP-420, while the updated role expands beyond classic NoSQL application development into AI retrieval, RAG, agent memory, conversation state, grounding data, and Microsoft Fabric integration. That makes early-October preparation unusual. Candidates testing before the update need to understand the previous Cosmos DB developer scope; candidates testing after October 6 should…

AZ-140 is easiest to misunderstand when it is treated as a collection of disconnected Azure Virtual Desktop features. The current exam is really about operating a complete desktop service: users authenticate, session hosts run workloads, profiles follow those users, applications arrive through the right delivery model, network paths have to perform, security controls have to hold, and the environment still has to survive updates and failures. Microsoft updated the exam objectives effective July 20, 2026. The current blueprint gives the largest share to planning and implementing Azure Virtual Desktop infrastructure,…

SAP on Azure architecture is difficult for one reason above all others: resilience has to work across several independent layers at the same time. An SAP application can have redundant virtual machines and still fail because the database, storage, name resolution, cluster quorum, network path, or recovery procedure was designed as if it were somebody else’s responsibility. The current AZ-120 exam reflects that reality. Microsoft’s April 17, 2026 skills outline covers migration, infrastructure design, high availability and disaster recovery, and the ongoing operation of SAP workloads in Azure. The Azure…

The AZ-400 exam remains active in October 2026 and Microsoft updated the English exam on July 27. The current outline emphasizes processes and communications, source control, build and release pipelines, security/compliance, and instrumentation. Build and release pipelines carry the largest share, so preparation that spends most of its time on generic DevOps definitions is badly balanced. AZ-400 also sits inside a changing Microsoft certification landscape. AZ-204 retired in July 2026, even though Microsoft still lists Azure Developer Associate as one of the prerequisite certification options for DevOps Engineer Expert alongside…

Strong Microsoft AZ-305 preparation starts before service selection. Azure architects are expected to translate business requirements into designs that balance security, reliability, performance, operations, data needs, and cost. A candidate who jumps directly from a keyword to a product often misses the architectural decision hidden in the scenario. AZ-305 remains current on October 6, 2026. This article focuses on the reasoning path from stakeholder language to an architecture decision, complementing the hands-on exercise and study-plan articles without becoming another generic pass guide. Separate requirements from preferences A stakeholder statement can…

Modern Microsoft analytics architecture is no longer best described as “Azure plus Power BI.” Azure still provides operational databases, integration services, application platforms, and specialized infrastructure, while Microsoft Fabric provides an integrated analytics plane built around OneLake, data engineering, warehousing, real-time analytics, data science, and Power BI. The useful architecture question is not which product should “win.” It is where each workload belongs. Operational applications need reliable transactional stores and application services. Analytical workloads need governed ingestion, transformation, semantic models, and consumption. Power BI needs trusted models rather than being…

The DP-300 exam is still active in October 2026, but candidates are studying during another Microsoft update window. Microsoft’s current study guide shows skills measured as of April 24, 2026 and a newer English version scheduled for October 27. That means anyone booking late October or afterward should confirm which objective set applies to the exam language and date. DP-300 validates Azure database administration across Azure SQL services and SQL Server in cloud, on-premises, and hybrid environments. The role is operational: plan and implement data-platform resources, secure them, monitor and…

DP-100 is no longer an active Microsoft exam. Microsoft retired Exam DP-100 and the Azure Data Scientist Associate certification on June 1, 2026. The current Microsoft direction is AI-300, which leads to the Machine Learning Operations Engineer Associate certification. The transition is not simply a new exam code. DP-100 focused on the data scientist building and deploying machine-learning solutions with Azure Machine Learning. AI-300 moves the center of gravity toward operating traditional machine learning and generative AI as production systems. Infrastructure, deployment, quality gates, model and asset lifecycle, observability, automation,…

AZ-801 retired on September 30, 2026 along with AZ-800. The advanced services it covered—security, high availability, disaster recovery, migration, and monitoring—still matter, but the current Windows Server Hybrid Administrator Associate path now uses the AZ-802 exam as its active measurement. Candidates should treat AZ-801 as historical curriculum, not a current booking option. This transition is useful because it exposes the real role: Windows Server administration is not divided cleanly into core and advanced work during an incident. Identity, virtualization, networking, storage, security, monitoring, and recovery interact. AZ-802 consolidates those responsibilities…