AZ-305 Azure Solutions Architect Expert: Complete Study Guide

AZ-305 vs AZ-304: What Changed?

Microsoft retired the AZ-304 exam in March 2022 and replaced it with AZ-305, Designing Microsoft Azure Infrastructure Solutions. The new exam places greater emphasis on design trade-offs, governance at scale, and cost optimization decisions — areas where the old exam was lighter. If you studied from AZ-304 materials, expect meaningful differences in question framing and depth.

AZ-305 is an expert-level certification. While it has no mandatory prerequisites, Microsoft strongly recommends earning AZ-104 (Azure Administrator Associate) first and having at least one year of hands-on Azure architecture experience. The exam tests design judgment, not just feature recall.

The 4 AZ-305 Design Domains

The AZ-305 blueprint is organized around four high-level design areas, each requiring you to reason about architecture across multiple services simultaneously.

• Design Identity, Governance, and Monitoring Solutions (25-30%): Azure Entra ID architecture including B2B, B2C, and hybrid identity with AD Connect. Management group hierarchies, landing zone design, Azure Policy initiatives, and Azure Monitor at enterprise scale. This domain is the heaviest-weighted and often the most exam-relevant.
• Design Data Storage Solutions (25-30%): Choosing between relational (Azure SQL, PostgreSQL), NoSQL (Cosmos DB), analytical (Synapse Analytics, Data Factory), and unstructured (Blob, Data Lake) storage. Expect scenario questions that require you to select the right consistency model, replication strategy, or migration path.
• Design Business Continuity Solutions (10-15%): Recovery Time Objective and Recovery Point Objective requirements mapped to Azure Backup, Site Recovery, geo-redundant storage, and active-passive vs. active-active multi-region architectures. Be prepared to calculate RTO/RPO trade-offs.
• Design Infrastructure Solutions (25-30%): Compute choices (VMs, App Service, AKS, Azure Functions, Container Apps), network topology design (hub-spoke, virtual WAN), landing zone patterns, and migration strategies (rehost, refactor, rearchitect). Azure Well-Architected Framework pillars are tested heavily here.

Case Study Questions: The AZ-305 Differentiator

Unlike associate-level exams, AZ-305 includes case study sections where you read a multi-page business scenario describing an organization's existing infrastructure, requirements, and constraints. You then answer five to eight questions all referencing the same scenario. This format tests whether you can synthesize information across a complex document rather than answer isolated feature questions.

Effective case study technique:

• Read the requirements tab first: The requirements section tells you what the architecture must achieve. Questions will always tie back to a named requirement.
• Note stated constraints: If the scenario specifies "minimize operational overhead" or "existing SQL Server licenses must be reused," those constraints eliminate entire categories of answers.
• Sketch the architecture: A quick pencil sketch of the scenario's existing setup helps you visualize which services connect to which, making integration questions much faster to resolve.
• Trust the scenario over general knowledge: If the scenario says something technically unusual, answer based on the scenario. The exam is testing your ability to work within given constraints, not debate Azure best practices in the abstract.

Recommended AZ-305 Resources

Microsoft Learn AZ-305 Learning Path

The official Microsoft Learn path for AZ-305 is the most reliable source of exam-aligned content. It covers all four design domains with architecture decision frameworks and hands-on exercises. Budget 35 to 45 hours for full completion.

Azure Architecture Center

Microsoft's Azure Architecture Center (learn.microsoft.com/azure/architecture) contains reference architectures for every major workload type. Studying these patterns — especially hub-spoke networking, microservices on AKS, and serverless event-driven design — directly prepares you for design-domain questions.

Scott Duffy's AZ-305 Course (Udemy)

Scott Duffy's AZ-305 course on Udemy is widely recommended for its scenario-based approach. Rather than walking through features, the course presents architectural problems and discusses how to solve them using Azure services — exactly the mindset the exam rewards.

For guidance on where AZ-305 fits in a longer certification journey, visit our Azure certification prep guide.

How Certify Copilot Helps You Think Like an Architect

AZ-305 questions are hard to self-review because wrong answers are not obviously wrong — they are often valid architectures that simply fail to satisfy one of the scenario's stated constraints. Reading a static answer explanation helps, but it rarely builds the decision framework you need to answer the next variant of the same question correctly.

Certify Copilot AI overlays your screen while you work through practice case studies and explains the architectural reasoning behind each correct choice in real time. When you select "Azure Traffic Manager" instead of "Azure Front Door," the AI does not just tell you the right answer — it explains what differentiates global load balancing from CDN-integrated load balancing, and when each is appropriate. Over hundreds of practice questions, this kind of contextual feedback builds the architectural intuition that AZ-305 tests directly.