Caution When Using Microsoft 365 Business Services: A Small Business Billing Lesson

A Cautionary Story for Small Business Owners

Recently, I discovered that my company had been overbilled for Microsoft 365 Business services because the number of paid licences on our account was much higher than the number of active users we actually had.

Like many small businesses, we use Microsoft Outlook and Microsoft business applications for staff email and work-related access. When a new employee joins the company, the process appears simple: you create a new user, assign them an email address under your company domain, and give them access to the Microsoft services they need for work.

During that process, Microsoft makes it easy to add another licence when a new user requires access. From a business owner’s point of view, this feels logical. If you add a new employee, the system increases the licences needed for the company.

The problem appears when staff leave.

Deleting a User Does Not Necessarily Reduce the Licence Count

In our case, we had reduced staff numbers late last year, during October, November, and December 2025. We went into the Microsoft system and deleted the accounts for staff who were no longer with the company. From what we could see, those users were no longer active, and they no longer had access to our company email or Microsoft services.

That should have been the end of the matter.

However, we later discovered that although the old users had been deleted, the paid subscriptions connected to those users had not automatically been reduced.

At the time we reviewed the account, we had only 8 or 9 active users, but Microsoft was still billing the company for 22 subscriptions.

This means we had removed the users, but we had not removed the licences.

The Renewal Problem

The issue became worse when the Microsoft subscriptions renewed in February. Microsoft had renewed all 22 subscriptions, even though many of those staff accounts had already been deleted months earlier.

When we raised the issue with Microsoft support, the explanation was that deleting a user account is not the same as reducing the number of subscriptions. Microsoft’s position was that the business owner or administrator must separately go into the subscriptions section and manually reduce the number of licences.

This is where I believe many small businesses can easily be caught out.

When you add a user, the system makes it easy to increase the number of licences. However, when you delete a user, the system does not necessarily reduce the number of paid subscriptions in the same automatic way.

That difference can create a very expensive mistake.

Why This Matters for Small Businesses

Small businesses regularly have staff joining and leaving. Employees change roles, contractors finish projects, and companies grow or reduce staff numbers depending on business conditions.

Most small business owners would reasonably assume that if they delete a former employee from the Microsoft system, the related cost would also stop or reduce. Unfortunately, that may not be the case.

In our situation, the company was left paying for licences that were no longer being used. We believed we had properly removed the old users because those users were no longer active in the system. But the subscription count remained higher than the number of actual users.

This is not a small technical detail. It can directly affect business cash flow, especially for small and medium-sized companies watching monthly and annual software costs carefully.

A Comparison With Other Business Platforms

This is not something I have experienced in the same way with platforms such as Google Workspace. In my experience, when users are added or removed from some other business platforms, billing is more closely connected to the active users being managed.

With Microsoft 365 Business services, business owners need to understand that user management and subscription management may be treated as separate actions.

That distinction is easy to miss.

My Concern With the Microsoft Process

I believe Microsoft should improve this process.

If the system can guide a business owner to add a licence when a user is created, it should also clearly warn the business owner when a user is deleted but the paid licence remains active.

At the very least, Microsoft should provide a strong warning message during user deletion, such as:

“This user has been deleted, but the paid licence remains active. Do you also want to reduce your subscription count?”

That simple message could save many small businesses from unexpected billing.

The current process places too much responsibility on the business owner to know that there is a separate subscription step hidden away from the user deletion process.

Warning to Other Small Business Owners

This post is a warning to other small business owners using Microsoft 365 Business services.

If you remove a staff member from your Microsoft account, do not assume that deleting the user automatically reduces your subscription costs.

You should check both:

1. The number of active users in your Microsoft admin account.

2. The number of paid licences or subscriptions being billed to your company.

Those two numbers may not be the same.

If they are not the same, you may be paying for licences that nobody in your company is using.

Final Thoughts

I hope Microsoft improves this system because the average small business owner may not understand that deleting a user does not necessarily remove the paid subscription linked to that user.

This is exactly the kind of billing trap that small businesses can fall into without realising it until renewal time.

Microsoft provides powerful business tools, but the subscription and licence management process needs to be clearer, fairer, and easier for ordinary business customers to understand.

Until Microsoft fixes this, business owners should regularly audit their Microsoft 365 users and licences to make sure they are not paying for services they no longer need.