Azure Landing Zone & Hybrid Backbone Architecture¶
Enterprise Landing Zone HITRUST CSF v11
Strategic Blueprint Overview¶
The Mosaic Healthcare Azure Landing Zone is architected in alignment with the Microsoft Cloud Adoption Framework (CAF) and custom tailored for high-acuity healthcare workloads, HIPAA compliance, and multi-facility operational resilience.
The architecture enforces strict operational separation across Management, Connectivity, Identity, and Workload domains, ensuring that compromised developer credentials or experimental sandbox failures cannot penetrate clinical environments containing Protected Health Information (PHI).
graph TB
subgraph "Mosaic Enterprise Tenant Root"
RootMG["Mosaic Healthcare Root Management Group
(Policy: Deny Public IPs, Enforce CMK, Require TLS 1.3)"] subgraph "Platform Services Domain" PlatformMG["Platform Management Group"] MgmtSub["Management Subscription
• Log Analytics Central
• Sentinel SIEM
• Azure Monitor / Automation"] ConnSub["Connectivity Subscription
• Azure Virtual WAN Hub
• Azure Firewall Premium
• ExpressRoute Gateway
• Private DNS Zones"] IdSub["Identity Subscription
• Entra ID Domain Services
• Domain Controllers (PaaS/IaaS)
• Conditional Access Policies"] end subgraph "Landing Zones Domain" LandingMG["Landing Zones Management Group"] ClinicalSub["Clinical Core Subscription
• Epic / Cerner EHR Clusters
• FHIR / HL7 Ingestion Services
• Private Endpoint Key Vault"] LakehouseSub["Healthcare Lakehouse Subscription
• Databricks Unity Catalog
• Azure Data Lake Gen2 (ADLS)
• TimesFM-3 Capacity Forecasters"] CorpSub["Corporate & Shared Services
• Billing & Revenue Cycle
• HR & Supply Chain ERP"] end subgraph "Sandboxes & Decommissioned" SandboxMG["Sandbox & Quarantine Management Group
(Isolated, Strict Budget Caps, No Clinical Data)"] end end RootMG --> PlatformMG RootMG --> LandingMG RootMG --> SandboxMG PlatformMG --> MgmtSub PlatformMG --> ConnSub PlatformMG --> IdSub LandingMG --> ClinicalSub LandingMG --> LakehouseSub LandingMG --> CorpSub
(Policy: Deny Public IPs, Enforce CMK, Require TLS 1.3)"] subgraph "Platform Services Domain" PlatformMG["Platform Management Group"] MgmtSub["Management Subscription
• Log Analytics Central
• Sentinel SIEM
• Azure Monitor / Automation"] ConnSub["Connectivity Subscription
• Azure Virtual WAN Hub
• Azure Firewall Premium
• ExpressRoute Gateway
• Private DNS Zones"] IdSub["Identity Subscription
• Entra ID Domain Services
• Domain Controllers (PaaS/IaaS)
• Conditional Access Policies"] end subgraph "Landing Zones Domain" LandingMG["Landing Zones Management Group"] ClinicalSub["Clinical Core Subscription
• Epic / Cerner EHR Clusters
• FHIR / HL7 Ingestion Services
• Private Endpoint Key Vault"] LakehouseSub["Healthcare Lakehouse Subscription
• Databricks Unity Catalog
• Azure Data Lake Gen2 (ADLS)
• TimesFM-3 Capacity Forecasters"] CorpSub["Corporate & Shared Services
• Billing & Revenue Cycle
• HR & Supply Chain ERP"] end subgraph "Sandboxes & Decommissioned" SandboxMG["Sandbox & Quarantine Management Group
(Isolated, Strict Budget Caps, No Clinical Data)"] end end RootMG --> PlatformMG RootMG --> LandingMG RootMG --> SandboxMG PlatformMG --> MgmtSub PlatformMG --> ConnSub PlatformMG --> IdSub LandingMG --> ClinicalSub LandingMG --> LakehouseSub LandingMG --> CorpSub
Core Landing Zone Sub-Sections¶
- Management Group Hierarchy & Policy Governance
Detailed taxonomy of management groups, hierarchical subscription placement, Azure Policy initiatives, and automated guardrails enforcing HITRUST CSF standards. - Hybrid Networking & Virtual WAN Backbone
Virtual WAN architecture, Secured Hub design with Azure Firewall Premium, ExpressRoute 10Gbps circuits, dual IPsec VPN fallback, and zero-trust private link endpoints. - Identity, Entra ID & Privileged Access Management
Hybrid identity synchronization, phishing-resistant FIDO2 MFA, Just-in-Time (JIT) Privileged Identity Management (PIM), and role-based access control (RBAC) tiers.