AZ-305 Exam Domains 2026: Complete Guide to All 4 Content Areas

AZ-305 Domain Overview

Exam AZ-305: Designing Microsoft Azure Infrastructure Solutions is organized into four scored content areas that Microsoft weights differently based on how often architects perform that work in real environments. Unlike administrator-level exams that test hands-on execution, AZ-305 tests design judgment - whether you can choose the right service, pattern, or configuration given a set of business and technical constraints. That distinction matters because it changes how you should study each domain: memorizing PowerShell syntax won't help you here, but understanding trade-offs between two similar Azure services absolutely will.

This guide breaks down all four domains with their official weightings, the specific technologies each one touches, and how to think about them relative to each other. If you want a broader pass strategy rather than a domain-by-domain breakdown, the AZ-305 Study Guide 2026 covers the full preparation arc from start to scheduling day.

Domain 1: Design Identity, Governance, and Monitoring Solutions (25-30%)

This domain sits just behind infrastructure in weighting, and it's frequently where well-prepared candidates lose points because it blends four distinct disciplines - identity, governance, monitoring, and security posture - into one scored area. Microsoft expects you to design solutions using Microsoft Entra ID (formerly Azure AD), not just describe what it does.

Case study questions in this domain often present a multi-subscription enterprise with compliance requirements, then ask you to pick the correct combination of management groups, policies, and RBAC assignments. For a full topic-by-topic breakdown with practice scenarios, see the dedicated AZ-305 Domain 1 study guide.

Domain 2: Design Data Storage Solutions (20-25%)

This domain tests whether you can match a data workload to the correct Azure storage or database service - and just as importantly, know when NOT to use a given service. Expect scenario questions that describe throughput, consistency, latency, or compliance requirements and ask you to select between relational, non-relational, and analytical storage options.

These questions rarely ask "what is Cosmos DB" - they ask which consistency model fits a global e-commerce cart scenario. That design-first framing is a hallmark of AZ-305 and one reason candidates coming from certification exams built around recall tend to underestimate it; the AZ-305 difficulty guide discusses this shift in exam expectations in more depth. The full topic list lives in the AZ-305 Domain 2 study guide.

Domain 3: Design Business Continuity Solutions (15-20%)

The smallest domain by weight, but not by complexity. Business continuity design blends disaster recovery, backup, and high availability into scenarios where you must balance recovery time objective (RTO) and recovery point objective (RPO) against cost.

Because business continuity questions often reference storage and infrastructure choices from other domains, this section rewards integrated thinking rather than isolated memorization. The AZ-305 Domain 3 study guide walks through common RTO/RPO scenario patterns in detail.

Domain 4: Design Infrastructure Solutions (30-35%)

This is the largest domain on the exam and the one most likely to appear across multiple question formats - case studies, drag-and-drop, and standard multiple choice. It covers compute, application architecture, networking, and migration design together, which means questions frequently combine two or three of these subtopics in a single scenario.

Networking decisions in particular tend to recur throughout the exam because they intersect with identity (private endpoints and access), data (secure connectivity to databases), and business continuity (cross-region traffic routing). Treat this domain as the backbone that the other three domains attach to. The full breakdown is in the AZ-305 Domain 4 study guide.

How These Domains Show Up on the Actual Exam

Microsoft does not publish an exact question count for AZ-305, but states that most certification exams typically contain 40-60 questions, delivered in 100 minutes of exam time (120 minutes of seat time) for the standard, non-lab format. The sandbox includes active screen, build list, case study, drag-and-drop, hot area, and multiple-choice formats, and possible labs. You also get access to Microsoft Learn documentation during the exam itself while the clock keeps running - a detail that changes how you should prepare, since you're not tested on pure recall of every setting name.

What this means practically: case study questions often bundle two or three domains into one scenario. A single case study might ask you to design a management group hierarchy (Domain 1), select a database replication strategy (Domain 2), and choose a DR topology (Domain 3) - all based on the same fictional company's requirements. This is why studying domains in isolation only gets you partway; you also need to practice synthesizing them together, which is exactly what full-length practice exams simulate.

Mapping the Domains to a Study Schedule

Rather than studying domains in the order Microsoft lists them, sequence your preparation by weight and dependency. Since Domain 4 (infrastructure) underpins concepts used in the other three, study it early. Domain 3 (business continuity) draws on both infrastructure and storage concepts, so it fits well toward the end as an integration checkpoint.

This is a light-touch schedule rather than a rigid template - adjust pacing based on which domains feel weakest after your first diagnostic practice test. For more granular week-by-week guidance and review techniques, the AZ-305 Study Guide 2026 expands on this structure.

Who Hires for This Domain Mix

The specific blend of these four domains reflects the actual job of a solutions architect: someone who sits above individual admin tasks and makes cross-cutting design decisions. Employers hiring for cloud architect, infrastructure architect, and senior Azure engineer roles look for this certification specifically because it validates judgment across identity, data, continuity, and infrastructure simultaneously - not just proficiency in one Azure service.

Because the prerequisite path requires holding the Azure Administrator Associate certification before AZ-305 can complete the Expert designation, candidates typically arrive with hands-on operational experience and use AZ-305 to formalize architectural decision-making skills on top of it. If you're evaluating whether this certification path aligns with your career goals, Is the AZ-305 Certification Worth It? and AZ-305 Salary Guide 2026 both dig into the career angle, while AZ-305 Jobs covers the roles that typically request this credential.

Registration, Pricing, and Renewal Mechanics

AZ-305 is delivered through Pearson VUE, either at a physical test center or via online proctoring. In the United States, pricing is typically $165 plus applicable taxes, though the exact amount varies by country or region since Microsoft prices exams locally. There's no separate member/non-member pricing tier published for this exam. For a full regional pricing breakdown and what's included, see AZ-305 Certification Cost 2026.

Once earned, the Microsoft Certified: Azure Solutions Architect Expert credential expires after 12 months, but renewal is free and completed through an online Microsoft Learn renewal assessment during your renewal window - no need to retake the full proctored exam. The exam content itself, including these four domains, was last updated for skills measured as of April 17, 2026, and Microsoft has not listed a retirement date.

To build hands-on familiarity with how these domains blend into exam questions, running full timed simulations on our AZ-305 practice test platform is one of the most direct ways to see how case studies pull from multiple domains at once. Start with a diagnostic run on the practice exams here to identify which of the four domains needs the most attention before your test date.

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