How Much Does Exchange to Microsoft 365 Migration Cost? (2026 Guide)

I get asked this question at least three times a week: "How much will it cost to move our Exchange server to Microsoft 365?"

The honest answer? It depends. But that is not helpful, so let me give you real numbers based on 500+ migrations we have completed at Medha Cloud over the past decade. Not theoretical pricing — actual costs businesses paid.

The Short Answer

For most small to mid-size businesses (50–500 mailboxes), you are looking at $7 to $25 per mailbox for the migration itself, on top of your Microsoft 365 licensing. A typical 100-user company spends between $1,500 and $4,000 total for a professionally managed migration.

But those numbers can swing wildly depending on your setup. Let me break it down.

What Actually Drives Migration Cost

After doing this for years, I can tell you the price tag comes down to six things. Miss any of them in your planning and you will get surprised by the invoice.

Cost Comparison: DIY vs MSP vs Microsoft FastTrack

Here is where it gets interesting. You have three paths, and they are not equally smart for every business.

The DIY Trap

I have to be blunt: the "free" DIY migration is almost never free. I have lost count of how many companies called us mid-migration because their internal IT got stuck. At that point you are paying emergency rates and your team already spent a week on it. If your IT person has never done an Exchange-to-M365 migration before, do not make your production environment their learning lab.

FastTrack — Free But Limited

Microsoft FastTrack is genuinely free if you have 150+ licenses. But here is what they do not tell you upfront: FastTrack provides guidance. They will walk your IT team through the process on calls. They do not actually do the migration for you in most cases. And they do not touch public folders, complex hybrid configurations, or anything that requires hands-on-keyboard work in your environment. For straightforward setups, FastTrack is great. For anything complicated, you will still need a partner.

What Medha Cloud Charges

The Costs People Forget

Migration cost is not just the migration itself. Budget for these too:

• Microsoft 365 licenses — Business Basic ($6/user/mo) to E5 ($57/user/mo). Most SMBs land on Business Standard at $12.50/user/mo.
• Third-party migration tools — If you are DIY, tools like BitTitan MigrationWiz cost $12–$25/mailbox. Quest, CodeTwo, and SkyKick are in a similar range.
• Temporary license overlap — You will run both environments for 1–4 weeks. Budget for that overlap.
• Training — People underestimate this. If your team is moving from Outlook 2013 to the new Outlook for M365, there is a learning curve.
• Decommissioning the old server — Someone has to properly shut down and wipe that Exchange server. Do not just unplug it.

How to Get the Lowest Migration Cost

Want to keep costs down? Here is what I tell every client:

1. Clean up before you migrate. Delete inactive mailboxes, archive old data, purge deleted items. You are paying per mailbox and per GB — migrate less stuff.
2. Do a mailbox audit. Know exactly how many mailboxes (all types), their sizes, and what data needs to move. Surprises mid-migration cost money.
3. Pick the right migration type. Do not overcomplicate it. If you have under 150 mailboxes and can handle a weekend cutover, do that. Hybrid is only worth it if you genuinely need coexistence.
4. Have your DNS provider credentials ready. Sounds basic, but I have seen migrations stall for days because nobody could log into GoDaddy.
5. Communicate with your users. The biggest hidden cost is support tickets from confused users. Send clear comms before, during, and after.

When DIY Actually Makes Sense

I am not going to pretend every company needs to hire a partner. If you have an IT person who has done Exchange-to-M365 migrations before, you have fewer than 50 mailboxes, no public folders, and you are on Exchange 2016 or 2019 — go for it. Microsoft's documentation is solid and the native tools work well for simple cutover scenarios.

But if any of the following are true, save yourself the headache and use exchange to office 365 migration services:

• More than 150 mailboxes
• Public folders with active data
• Compliance requirements (HIPAA, SOC 2, etc.)
• Exchange 2010 or 2013
• Hybrid coexistence needed
• Zero tolerance for downtime

Still Running an Old Exchange Server?

If you are on Exchange 2016 or 2019, keep in mind that exchange server support is critical because both hit end of support in October 2025. That means no more security patches. Every month you wait, you are running unpatched email infrastructure. The migration cost only goes up as your data grows and your server ages.

Our office 365 migration services start at $15/user — get a free assessment →