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Cloud Migration

Migrating a Full On-Premises VMware Estate to Microsoft Azure

Led the move of a client's entire on-premises virtualization footprint into Microsoft Azure, replacing physical infrastructure ownership with a managed cloud platform.

Engagement snapshot

Who this was for and what it involved

  • ClientA client running its full infrastructure on-premises on VMware
  • EnvironmentA complete on-premises VMware estate prior to migration, with no hybrid or cloud footprint in place at the start of the engagement.
  • Engagement period2021 to 2023

Delivered by ThirtyZero's founder in senior technical and compliance roles prior to founding the company. Client names and identifying details are withheld under confidentiality.

Azure Solutions Architect Expert
The challenge

What we walked into

The client's entire infrastructure sat on-premises on VMware. Every capacity increase meant new hardware to procure, rack, and maintain, and every hardware refresh cycle competed for budget and time with the work that infrastructure was supposed to support.

Moving to Microsoft Azure meant re-platforming the full VMware estate onto Azure's infrastructure, without a phased pilot to fall back on. The migration needed to preserve what already worked while removing the physical hardware dependency underneath it.

What we did

The approach

01

Assess the existing VMware estate

Reviewed the full on-premises VMware environment, including virtual machine inventory, dependencies, and networking, to plan a migration path into Azure.

02

Migrate the infrastructure into Azure

Led the move of the client's VMware workloads into Microsoft Azure, replacing on-premises hardware ownership with Azure's managed infrastructure.

03

Validate and hand over the Azure environment

Confirmed the migrated environment operated correctly in Azure and handed over a cloud infrastructure that no longer depended on the client maintaining its own physical hardware.

Results

What came out of it

  • The client's full on-premises VMware estate migrated to Microsoft Azure.
  • Physical hardware ownership and refresh cycles removed from the client's infrastructure planning.
  • Delivered as a full estate migration, not a partial or pilot-only move.
VMware (source environment)Microsoft AzureAzure infrastructure migration tooling
Good to know

Frequently Asked Questions

Why move a full VMware estate to Azure rather than staying on-premises?

Staying on-premises means every capacity increase requires new hardware, and every refresh cycle is a capital project competing for budget. Moving to Azure replaces that hardware ownership with a managed cloud platform, so capacity becomes a configuration decision instead of a procurement one.

How long does a full VMware-to-Azure migration take?

It depends on the size of the VM inventory, how interconnected the workloads are, and whether the client can tolerate a phased cutover or needs everything to move together. A full estate migration generally takes longer to plan than a partial one, but avoids leaving a hybrid environment running indefinitely.

What is the biggest risk in a project like this?

Dependencies that are not documented anywhere. On-premises environments accumulate undocumented connections between systems over time, and finding them during migration planning, rather than after cutover, is what keeps a migration from turning into an outage.

Can this be done in stages instead of all at once?

Yes, phased migrations are common and often lower risk for complex environments. This particular engagement was scoped as a full estate migration, but the same assessment and migration approach applies whether the move happens in one pass or several.

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