Update: Corrected the Expert certification prerequisite: Azure Administrator Associate is required; Azure Developer Associate is not a substitute.
Azure Administrator (AZ-104) and Azure Solutions Architect Expert (AZ-305) are two of the most searched-for Microsoft certifications, and they are often confused because both deal with running Azure infrastructure. In practice they sit at different levels of experience and test different skills entirely. This guide compares them side by side - audience, prerequisites, exam content, difficulty, and career impact - and ends with a decision framework so you know exactly which one to study for next.
What AZ-104 and AZ-305 actually are
AZ-104 (Microsoft Certified: Azure Administrator Associate) is an associate-level certification that validates day-to-day Azure administration: managing identities, storage, virtual machines, networking, and monitoring inside an existing Azure environment. AZ-305 (Microsoft Certified: Azure Solutions Architect Expert) is an expert-level certification that validates the ability to design solutions - choosing services, patterns, and trade-offs before anything is built - across identity, data, business continuity, and infrastructure.
AZ-104: hands-on administration
AZ-104 is about operating Azure. You are tested on tasks an administrator does routinely: creating and managing virtual machines, configuring virtual networks and network security groups, managing Microsoft Entra ID (formerly Azure AD) users and groups, setting up storage accounts and access tiers, and monitoring resource health with Azure Monitor. The exam assumes you can already work inside the Azure portal, CLI, and PowerShell, not just recognize service names.
AZ-305: architecture and design
AZ-305 is about designing Azure solutions, not operating them. You are given business and technical requirements and asked to choose and justify an architecture - which identity model, which data store, which disaster recovery pattern, which network topology - and to weigh cost, security, and scalability trade-offs. There is very little portal click-through content; almost every question is a design decision.
The AZ-104 prerequisite Microsoft actually enforces
Microsoft lists Azure Administrator Associate as the prerequisite certification for Azure Solutions Architect Expert, alongside the AZ-305 exam requirement. Azure Developer Associate is not an alternative prerequisite. Keep the credential requirements separate from exam scheduling: an AZ-305 pass alone does not establish that you have earned the Expert certification.
Skills measured: how the exam content differs
AZ-104 domains
- Manage Azure identities and governance (roughly 20-25% of the exam) - Microsoft Entra ID users and groups, RBAC, subscriptions, and management groups.
- Implement and manage storage (roughly 15-20%) - storage accounts, blob lifecycle, Azure Files, and access control.
- Deploy and manage Azure compute resources (roughly 20-25%) - VMs, availability sets and zones, containers, and ARM/Bicep templates.
- Implement and manage virtual networking (roughly 15-20%) - VNets, peering, load balancers, and Azure Bastion.
- Monitor and maintain Azure resources (roughly 10-15%) - Azure Monitor, backup, and resource health.
AZ-305 domains
- Design identity, governance, and monitoring solutions (roughly 25-30%) - Entra ID, RBAC, Azure Policy, Key Vault, and logging architecture.
- Design data storage solutions (roughly 25-30%) - relational vs non-relational choices, storage tiers, and data integration and analytics.
- Design business continuity solutions (roughly 10-15%) - backup, disaster recovery, and high-availability patterns.
- Design infrastructure solutions (roughly 30-35%, the single largest domain) - compute, networking, application architecture, and migration strategy.
Difficulty, format, and study time
Both exams run for roughly 100-150 minutes with a mix of multiple-choice, drag-and-drop, and scenario-based questions, and AZ-305 typically leans on longer case-study-style scenarios than AZ-104. Difficulty is not really comparable in absolute terms because the two exams test different things: AZ-104 is harder for someone with zero hands-on Azure time, while AZ-305 is harder for someone who has operated Azure but never had to design a system from scratch under competing constraints.
- AZ-104 study time: roughly 6-10 weeks of part-time study for someone with some IT background, longer without any cloud experience.
- AZ-305 study time: roughly 8-12 weeks on top of an AZ-104-level foundation, since much of the prep is learning to reason about trade-offs rather than learning new facts.
Who each certification is really for
AZ-104 fits you if
- You work hands-on in Azure day to day - provisioning, configuring, and troubleshooting resources.
- You are a sysadmin, help desk, or IT generalist moving into cloud operations.
- You want the certification most directly aligned to an Azure Administrator job title.
AZ-305 fits you if
- You already design systems - choosing services and patterns before a team builds them.
- You are targeting a Solutions Architect, Cloud Architect, or senior engineering role.
- You have real Azure experience and want the expert-level credential to match; Microsoft explicitly recommends solid, hands-on knowledge of administration, development, and DevOps before attempting AZ-305.
Career impact and salary context
AZ-104 is one of the most requested Azure certifications in job listings because so many roles genuinely involve day-to-day Azure administration. AZ-305 carries more individual weight as a senior-level signal - it is far less common, and pairing it with the required AZ-104 credential (giving you the full Solutions Architect Expert title) tells employers you can both design and operate Azure environments. As with any certification, actual compensation depends far more on your experience, role, and location than on the credential alone; treat these certifications as door-openers and let your project experience close the gap in interviews.
A decision framework by background
- New to Azure or IT in general: start with AZ-900 for vocabulary, then move to AZ-104.
- Hands-on sysadmin, help desk, or Azure administrator: go straight to AZ-104.
- Experienced engineer who already designs systems and wants the Expert badge: prepare for AZ-305 and confirm that you also meet the Azure Administrator Associate prerequisite.
- Targeting a Solutions Architect job specifically: treat AZ-104 as the fastest route to real Azure fluency, then move to AZ-305 once you can reason about trade-offs, not just configure resources.
The bottom line
AZ-104 and AZ-305 serve different purposes: administration and design. Azure Administrator Associate is also part of the Expert certification path. Choose study activities that address your experience gaps; neither exam alone guarantees a job. For design practice after administration study, try an architecture decision journal.