You Don’t Need Five Project Server Instances. You Never Did.
I recently got a call from a Microsoft rep I’d worked with before.
He was helping an organization plan their Project Online migration and something wasn’t sitting right with him. They were running five separate Project Online instances — one per department — and had been told they needed to migrate each one to its own dedicated Project Server environment.
Five SQL Server licenses. Five Windows Server licenses. Five Project Server licenses. Five installs. Five configurations. Five security models to build and maintain. Five environments to support when something breaks.
He knew there had to be a better way, so he picked up the phone.
And when I got on the call with the organization and asked why they were planning five separate instances, the answer stopped me cold.
“That’s what we were told to do.”
Nobody questioned it. Nobody ran the numbers. The assumption was that what they had in Project Online had to be recreated — one-for-one — in Project Server.
It didn’t.
What Five Instances Actually Costs You
Let’s talk real numbers.
Each Project Server environment requires its own SQL Server license, its own Windows Server license, and its own Project Server license. Before you add a single user, you’re already multiplying your infrastructure cost by the number of instances you’re running.
Then there’s the human cost. Every instance has to be:
- Installed and configured from scratch
- Integrated with Active Directory and SharePoint
- Given its own security model
- Tested, patched, and maintained over time
- Supported when something breaks
That’s not a one-time cost. That’s a recurring burden that compounds every year.
For most organizations running two or more instances, the total cost — licenses, admin labor, and support overhead — is easily in the six figures annually. For five instances, you’re often paying three to five times what you should be.
And that’s before you factor in the migration cost itself. Five environments to migrate means five times the planning, five times the testing, and five times the risk.
The Fix Has Been There the Whole Time
Project Server has supported multitenancy for years. Most organizations just don’t know it — and apparently, neither do all the people advising them.
With a single Project Server deployment, you can support multiple departments — each with their own isolated PWA instance, their own project portfolios, their own security boundaries, and their own reporting views.
Finance sees Finance projects. Engineering sees Engineering projects. Operations stays in their lane.
And the visibility works at every level of the organization:
Leadership gets the full picture — a top-down view across every department, every portfolio, every project. For the first time, the executive team can see the entire organization’s work in one place without logging into five different systems.
Project managers see only what’s relevant to them. No clutter from other departments, no noise from projects they have nothing to do with. Just their portfolios, their teams, their work.
Team members see only their own assigned tasks — even if they happen to work across multiple departments. Their view is clean, focused, and personal.
Each group gets exactly the right level of visibility. Nobody gets more than they need, and nobody gets less than they deserve.
Each department gets what feels like a dedicated system. IT manages one platform.
One SQL Server. One Windows Server. One Project Server. One security model to govern. One environment to patch, support, and maintain.
The departments don’t feel any difference. Your IT team feels every bit of it.
What Happened With This Organization
Once we walked through the multitenancy option, the decision wasn’t hard.
They migrated all five Project Online instances into a single Project Server deployment. Each department kept their own PWA instance, their own portfolios, and their own security boundaries — exactly what they had before, just without the infrastructure sprawl behind it.
The infrastructure cost dropped dramatically. The admin burden dropped with it. And for the first time, leadership had a single platform giving them visibility across the entire organization’s project portfolio.
All because one Microsoft rep stopped and asked whether five really needed to be five.
Before You Start Your Migration, Ask This Question
How many Project Online instances are you running today?
If the answer is more than one, ask yourself whether you actually need to recreate all of them — or whether you’ve been handed a plan that nobody stopped to question.
Multitenancy isn’t a workaround. It’s the right architecture for most mid-to-large organizations running Project Server. And for organizations planning a migration from Project Online, it could be the single biggest cost-saving decision in the entire project.
Sometimes the smartest move is to rebuild less than you planned to.
If you’re planning a Project Online migration and want to talk through whether consolidation makes sense for your organization, reach out. This is exactly the kind of conversation I have with organizations every day.
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