Migrating from AWS to Azure is increasingly common for Windows-heavy environments and Microsoft ecosystem consolidation. This guide covers the full assessment, cost and approach.
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Microsoft ecosystem alignment (M365, Entra ID), Azure Hybrid Benefit savings on Windows (often 20-40% cheaper than AWS for Windows), stronger compliance certifications, Microsoft EA consolidation, Azure AI and Fabric platform.
EC2→Azure VMs, S3→Blob Storage, RDS→Azure SQL/SQL MI, Lambda→Azure Functions, EKS→AKS, CloudWatch→Azure Monitor, IAM→Entra ID, VPC→VNet, Route53→Azure DNS.
Windows-heavy $150K/year on AWS: Azure PAYG $140-155K (similar). Azure with AHB + 3yr RI: $85-100K/year (33-43% saving). Linux workloads: smaller saving (5-15%).
AWS egress: $0.09/GB. 100TB = $9,000 in egress charges alone. Azure ingress free. Use AWS Snowball or Azure Data Box for large datasets. Plan timing carefully.
Assessment (2-4wks) → Landing Zone (4-6wks) → Non-prod migration (4-8wks) → Production migration (8-16wks) → AWS decommission (4wks).
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