⚙️ Lab note (added September 2026): every agent in this series was built and run in the new Copilot Studio experience — what Microsoft now calls the GitHub Copilot harness (GA August 2026). The classic “standard harness” is a different build experience with different behaviour — my standard-harness rebuild and full harness comparison are scheduled on this blog for late October 2026.
On September 1, 2026, I was in the middle of testing a freshly built Copilot Studio agent when it stopped mid-conversation and told me, politely, that the ride was over. Not a bug, not an outage — an invoice-shaped wall, on the very day Microsoft switched developer and trial environments over to credit pricing. This post is the licensing walkthrough I wish I had read that morning: what the wall looks like, the two trials that get you a fully working agent lab for exactly $0, the auto-renewal trap hiding inside those trials, and who actually needs which license.
If you have not built the agent yet, start with the first post in this series — this one picks up where the setup left off.
The Wall: EnforcementUsageCredits
Here is what my test pane returned, verbatim, the moment I asked the agent its first question:
Copilot Studio’s new experience meters everything — building, testing, running — in Copilot Credits, pooled per environment. When the pool is empty you have three options: buy prepaid credit packs, attach pay-as-you-go billing to the environment, or hold a trial that carries capacity. For a lab, the third option is the whole story.
Step 1 — Activate the Copilot Studio Trial (This Clears the Wall)
In the Microsoft 365 admin center, go to Marketplace and search for “Copilot Studio”. The product page offers four plans — and the names are confusingly similar, so read twice:
- Microsoft Copilot Studio User License — free, assignable to makers; it grants access, not capacity.
- Microsoft Copilot Studio (Trial) — free for one month, 25 licenses, and crucially it carries the capacity that clears the credit wall.
I picked the trial, and within a minute of checkout my agent answered questions again. No pay-as-you-go setup, no credit card entry — the billing profile already on the tenant was enough.
Step 2 — Activate the Microsoft 365 Copilot Trial (for Work IQ)
The second trial matters the moment your agent touches Microsoft 365 work data — mail, files, SharePoint — through the Work IQ tools we will meet later in this series. Those tools require a Microsoft 365 Copilot seat for the connecting user. Small-business tenants (up to 300 seats, with a qualifying Business plan) get a self-service Microsoft 365 Copilot Business (Trial): 25 seats, 30 days, $0. It appeared under “Special offers” in my Marketplace. Activate it, then assign one seat to yourself under Users › Active users › Licenses and apps — the trial gives you seats, but nobody is licensed until you assign one.
Step 3 — Defuse the Auto-Renewal Trap (Do Not Skip This)
⚠️ Important: both trials default to converting into paid subscriptions when they expire. And the defaults are not shy: my Copilot Studio trial proposed renewing into a one-year plan at roughly CA$3,680, charged to the card on file. A free experiment that quietly becomes a four-figure annual commitment is not a free experiment.
The defusal takes two minutes per trial. During checkout, set the renewal to 1 license / 1 month. Then immediately after, go to Billing › Your products, open the subscription, choose Edit recurring billing, and select Cancel on expiration. The change shows as a pending transaction for a few minutes, then the page confirms it in plain words:
Who Needs What License
This is the matrix I now keep taped to the wall:
- The maker (you): a Copilot Studio user license to build, plus a Microsoft 365 Copilot seat if your agent uses Work IQ tools.
- The Dynamics 365 end user: their existing D365/Power Apps license. Chatting with a published agent inside an app requires no Copilot Studio license of their own.
- The Teams / M365 Copilot user: a Microsoft 365 Copilot seat to reach the agent on that surface.
- The tenant: pooled Copilot Credits — trial capacity in a lab, prepaid packs or pay-as-you-go in production. This is the meter that actually runs.
Key insight: access licenses and capacity are different taxes. A user license without credits gives you a beautifully configured agent that cannot speak; credits without user licenses give you capacity nobody can build against. You need one of each column.
What I Learned
The credit wall arriving on the exact day of my experiment was annoying and clarifying in equal measure: agent runtime is now a metered utility, and the meter starts in your dev environment, not just production. Plan for it the way you plan for Azure consumption — and treat every “free trial” checkout page as a contract, because the renewal section is where the real price lives. Free trials are free the way puppies are free.
Next in this series: MCP and Work IQ — the plug and the appliance — and why your agent’s tool catalog suddenly looks the way it does.
