My curated list

There are plenty of resources out there to help you study for the AZ-900 exam. The exam is for candidates who are just beginning to work with cloud-based solutions and services.

It’s an opportunity to gather knowledge of cloud concepts, services, workloads, security, privacy, pricing and support. Here comes my list:

Cloud Concepts

Benefits
https://docs.microsoft.com/en-us/learn/modules/fundamental-azure-concepts/benefits-of-cloud-computing

Elastic
https://azure.microsoft.com/en-us/overview/what-is-elastic-computing/

Consumption and fixed cost models
https://docs.microsoft.com/en-us/azure/architecture/framework/cost/design-price

Shared responsibility
https://docs.microsoft.com/en-us/azure/security/fundamentals/shared-responsibility

Cloud Computing
https://docs.microsoft.com/en-us/learn/modules/fundamental-azure-concepts/types-of-cloud-computing

IAAS
https://azure.microsoft.com/en-us/overview/what-is-iaas/

PAAS
https://azure.microsoft.com/en-us/overview/what-is-paas/

SAAS
https://azure.microsoft.com/en-us/overview/what-is-saas/

Cloud Models
https://azure.microsoft.com/en-us/overview/what-are-private-public-hybrid-clouds/

Public cloud
https://azure.microsoft.com/en-gb/overview/what-is-a-public-cloud/

Geographies
https://azure.microsoft.com/en-us/global-infrastructure/geographies/#overview

Region and availability zones
https://docs.microsoft.com/en-us/learn/modules/azure-architecture-fundamentals/regions-availability-zones

Compute
https://azure.microsoft.com/en-us/product-categories/compute/

Virtual machines
https://docs.microsoft.com/en-us/learn/modules/azure-compute-fundamentals/azure-virtual-machines

Serverless
https://docs.microsoft.com/en-us/learn/modules/azure-compute-fundamentals/azure-functions

Previews
https://azure.microsoft.com/en-us/support/legal/preview-supplemental-terms/

Pricing
https://docs.microsoft.com/en-us/learn/modules/plan-manage-azure-costs/ https://azure.microsoft.com/en-us/pricing/calculator/
https://azure.microsoft.com/en-us/pricing/tco/calculator/

Core Solutions

Big Data
https://docs.microsoft.com/en-us/azure/architecture/guide/architecture-styles/big-data

IoT
https://docs.microsoft.com/en-us/azure/iot-fundamentals/iot-introduction

Cognitive Services
https://azure.microsoft.com/en-us/services/cognitive-services/

Goverance

Strategy
https://docs.microsoft.com/en-us/learn/modules/build-cloud-governance-strategy-azure/

Resource Groups
https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/overview#resource-groups

Azure Management Groups
https://docs.microsoft.com/en-us/azure/governance/management-groups/overview

Policy
https://docs.microsoft.com/en-us/azure/governance/policy/overview

Blueprints
https://docs.microsoft.com/en-us/learn/modules/build-cloud-governance-strategy-azure/8-govern-subscriptions-azure-blueprints


Identity & Access

Azure AD
https://docs.microsoft.com/en-us/azure/active-directory/fundamentals/active-directory-whatis

SSO
https://docs.microsoft.com/en-us/azure/active-directory/manage-apps/what-is-single-sign-on

MFA
https://docs.microsoft.com/en-us/azure/active-directory/authentication/concept-mfa-howitworks

Management Tools

Azure Advisor
https://docs.microsoft.com/en-us/azure/advisor/

Azure Cloud Shell
https://docs.microsoft.com/en-us/azure/cloud-shell/overview

Azure Cost Management
https://docs.microsoft.com/en-us/learn/paths/az-900-describe-azure-cost-management-service-level-agreements/

Azure Key Vault
https://docs.microsoft.com/en-us/azure/key-vault/

Azure Monitor
https://docs.microsoft.com/en-us/azure/azure-monitor/overview

Azure Resource Manager
https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/overview

Azure Service Health
https://docs.microsoft.com/en-us/azure/service-health/overview

Azure Service Trust
https://servicetrust.microsoft.com/


Network & Security

Network
https://docs.microsoft.com/en-us/azure/security/fundamentals/network-overview

CDN 
https://docs.microsoft.com/en-us/azure/cdn/cdn-overview

Load Balancing 
https://docs.microsoft.com/en-us/azure/architecture/guide/technology-choices/load-balancing-overview

Defense in depth 
https://docs.microsoft.com/en-us/learn/modules/secure-network-connectivity-azure/2-what-is-defense-in-depth

Perimeter networks 
https://docs.microsoft.com/en-us/azure/cloud-adoption-framework/ready/azure-best-practices/perimeter-networks

VPN 
https://docs.microsoft.com/en-us/learn/modules/azure-networking-fundamentals/express-route-fundamentals

Network Security 
https://docs.microsoft.com/en-us/azure/cloud-adoption-framework/ready/considerations/networking-options

Network Security Groups 
https://docs.microsoft.com/en-us/azure/virtual-network/network-security-groups-overview

DDoS 
https://docs.microsoft.com/en-us/azure/ddos-protection/ddos-protection-overview

I hope this list helps you.