10 reasons defense contractors with CUI move from Microsoft 365 Commercial to GCC High

If your contracts carry DFARS 252.204-7012 and you handle Controlled Unclassified Information, where that data lives matters. Commercial Microsoft 365 isn't where it should be.

The trigger is CUI specifically. Not a vague sense that "government work needs government cloud." If CUI or export-controlled data is in your mailboxes, Teams and file shares today, the gap is already open.

That's why we treat the move as urgent. Not because of a deadline we made up, but because the exposure exists now and grows with every new file.

The fix is a defined project with a start and an end.

Most people expect a toggle in the admin center. There isn't one. Commercial can't be upgraded into GCC High.

GCC High is a separate tenant in a separate cloud. You get a new environment, and your mail, files and identities move across to it. Then the old tenant gets decommissioned on a schedule.

Knowing that early saves you a lot of surprise later. Licensing, identity, devices and every connected app have to be planned for the new tenant, not carried over by default.

You're not changing a setting. You're changing where the business runs.

The most expensive mistake we see is moving data before deciding where CUI is allowed to live. Do that and you end up migrating twice: once to get there, again to fix the line you didn't draw.

So the boundary comes first. Which people, which data, which systems sit inside it. Which third-party apps you rely on, and whether they support GCC High at all. Some don't, and it's better to know before cutover than after.

Only then do we build and move.

Draw the line, then move the data. Never the other way around.

You don't always have to move the whole company. Some firms put only the people and data that touch CUI into a GCC High enclave and keep everyone else on commercial. Others move everything, because running two tenants costs more in friction than it saves in licensing.

Neither answer is right by default. It depends on how many people touch CUI, how your teams share work, and how much separation you can live with day to day.

We've written up the trade in detail: GCC High enclave or full migration.

The right scope is the one you can actually operate.

GCC High licensing isn't bought the way commercial licensing is. There's an eligibility step, and Microsoft makes that decision, not us. We support you through it.

We supply and invoice the licensing for Microsoft 365 GCC High, and for Azure Government where you need it. It's billed separately from the project fee, and we'll walk you through it on the call.

One less vendor to chase while you're mid-migration.

Licensing is part of the plan, not a separate errand. More on how it works: GCC High licensing.

Microsoft 365 isn't always the only thing holding CUI. If you run servers, file shares, line-of-business apps or virtual desktops that touch the same data, they may need to sit inside the same government boundary.

Where that's in scope, we build it in Azure Government alongside the tenant, including Azure Virtual Desktop if you need it. Where it isn't, we leave it alone.

See how this fits the migration: Azure Government on the migration page.

One boundary, drawn around everything that holds CUI.

You get a fixed fee set by your size and the project's scope. We quote it after scoping, once we've seen what you actually run. No open-ended hourly billing.

A typical migration takes about 5 weeks from signing to cutover. Size changes that, and so does how much is connected to your current tenant. We'll tell you where you're likely to land once we've seen the environment.

We work with companies from 5 users up. There's no upper limit.

You know the price before work starts, and you know roughly when it ends.

Let's be plain about this. Cloud Kings is not a C3PAO. We don't perform certification assessments, and we can't promise an assessment result or an SPRS score.

What we do is build and migrate the GCC High environment an assessor will look at. That means identity in Microsoft Entra, Conditional Access, device management in Intune, logging with Microsoft Sentinel and evidence export. At handover you get a pack you can use in your System Security Plan.

We won't promise zero downtime either. A cutover is a cutover. We plan it so the disruption is short and expected.

We do the build. Your assessor does the judging.

GCC High costs more and asks more of you than commercial. If you hold only Federal Contract Information, a properly configured commercial tenant is usually the right home. If you don't handle CUI or export-controlled data, you probably don't need GCC High at all.

So the first thing we check is whether you need it. If your obligations don't require it, we'll say so on the first call. That's a faster outcome for both of us than a proposal neither of us believes in.

Not sure where you stand? Try the CMMC gap indicator first.

The cheapest migration is the one you didn't need.

This isn't a side line for us. Moving defense contractors from commercial Microsoft 365 to GCC High is our core work. We're not a generic MSP working through a ticket queue.

After cutover, some firms want us to keep running the environment. If that's you, there's a straightforward offer:

Sign a 48-month managed services agreement and we waive the setup fee.

That covers the build and migration fee, under either Managed CMMC or Managed IT, at any company size. Licensing is still billed.

It's short on purpose. We'll ask:

• Do you handle CUI or export-controlled data, and under which contracts?
• How many users, and how many of them touch CUI?
• What's connected to your tenant today: apps, devices, servers?
• Do you think you need an enclave or a full move?

You'll leave knowing whether GCC High fits, what the next step is, and roughly how long it would take. If it isn't a fit, we'll say so.