Author: Ashish Kumar

Published: 21-Sep-2021

If your organization is still running Microsoft SQL Server, SharePoint, Exchange, or Windows Server on-premises or on legacy infrastructure, the cost of standing still is rising every quarter, in licensing, hardware refresh cycles, and slower time-to-market for new features.

Migrating Microsoft workloads to AWS isn’t just a cost-cutting exercise. It’s a decision that directly impacts uptime, security posture, compliance readiness, and how fast your teams can ship. This guide breaks down the business case, the technical path, and what to evaluate before you commit.

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Why CIOs and CTOs Are Prioritizing This Migration Now

Education, public sector, and nonprofit organizations were early movers here, largely driven by budget pressure. But the benefits extend to any enterprise running Microsoft-based infrastructure at scale:

• Reduced backup and recovery windows – organizations running Microsoft SQL Server on Amazon EC2 report significantly faster backup times to the cloud, at a lower cost than traditional backup infrastructure.
• Higher application availability – clustering SQL Server databases across multiple AWS Availability Zones removes single points of failure that plague on-premises setups.
• Lower total cost of ownership – eliminating hardware refresh cycles and rightsizing compute against actual demand, instead of provisioning for peak capacity year-round.

Migrating Core Microsoft Applications: What’s Actually Involved

Database tier: SQL Server workloads move to Amazon EC2, with Amazon EBS providing durable storage and Availability Zone clustering for resilience.

Content and collaboration tier: SharePoint, Exchange, and Windows Server can run together on AWS infrastructure. Static content and media move to Amazon S3, with Amazon CloudFront handling global content delivery, critical if you have distributed teams or customers.

Identity and access: Existing Microsoft Active Directory integrates directly with Amazon Virtual Private Cloud (VPC), so you’re not rebuilding your identity layer from scratch.

Licensing: Using AWS EC2 Dedicated Instances, enterprises can bring their own SQL Server licenses to AWS (License Mobility) and stay fully compliant with Microsoft’s terms of use, a common blocker CIOs flag before migration, resolved without a licensing overhaul.

Compliance: The Question Every Decision-Maker Asks First

Before signing off, most CIOs and CTOs want a straight answer on compliance. AWS holds accreditations including:

• FedRAMP (Federal Risk and Authorization Management Program)
• ITAR (International Traffic in Arms Regulations)
• SOC reporting
• ISO 27001

This isn’t a checkbox exercise, it directly affects whether your legal and security teams will approve the migration, and how quickly you can tell your own customers their data is protected.

Proof It Works: IATA’s Migration

The International Air Transport Association (IATA) needed to boost performance of its business intelligence platform without compromising data confidentiality. AWS’s ISO 27001 certification cleared that bar.

After migrating its BI platform, IATA built a new intranet on AWS running Microsoft SharePoint 2013 with NewsGator/Sitrion for social collaboration, all hosted on Amazon VPC and fully integrated with their existing Active Directory.

The result: IATA now ingests terabytes of data without prior capacity planning and processes it fast, a capability their previous infrastructure couldn’t deliver at the same cost or speed.

AWS vs. On-Premises: What Changes

Factor	On-Premises / Legacy	Microsoft Workloads on AWS
Backup speed	Slower, hardware-bound	Significantly faster
Scaling	Manual capacity planning	On-demand, no pre-provisioning
Availability	Single-site risk	Multi-AZ clustering
Licensing	Often locked to hardware	License Mobility to EC2 Dedicated Instances
Compliance	Self-managed, costly to certify	Inherits AWS’s FedRAMP, ITAR, SOC, ISO 27001
New feature velocity	Slower release cycles	Faster, cost-effective releases

What This Means for Your Roadmap

If cost is the trigger for evaluating this migration, treat it as the entry point, not the finish line. The organizations getting the most value are the ones that use the migration to also fix availability gaps, simplify licensing compliance, and build a platform that can absorb the next five years of application growth without another re-architecture.

Next Step

Every environment is different, the right migration path depends on your current Microsoft footprint, compliance requirements, and growth plans.

Talk to an AWS Migration Specialist →