Understanding Unassigned Microsoft 365 Licenses and How to Manage Them

Each Microsoft 365 tenant typically holds a few licenses due to various reasons—whether it’s leftover seats from a hiring initiative that didn’t pan out, licenses freed up after an employee departs, or unused Copilot licenses that never transitioned past the pilot group. These licenses linger in the available count on the Licenses page, costing your organization every month until you take proactive steps to adjust the quantity. Unfortunately, many organisations overlook this detail until renewal day arrives.

When an employee leaves and their license becomes available again, it’s common for the next new hire to receive a brand new license without checking if there are spare licenses already in the pool. This cycle can continue for a year, causing your unassigned licenses to accumulate over time. The primary reason these surplus licenses go unacknowledged is often a lack of ownership of the numbers involved. Thankfully, unassigned licenses are the easiest type of Microsoft 365 waste to fix because you don’t require usage data to identify them.

Key Takeaways

• An unassigned license means you’re paying for a seat that isn’t linked to any user.
• Microsoft bills you for each purchased license, meaning unassigning alone doesn’t save costs—you need to remove the license from your subscription.
• The number of unassigned licenses can be misleading due to free or trial SKUs—ensure you filter to paid SKUs for accurate tracking.
• Simply blocking a departing employee’s sign-in doesn’t free up their license—the license still counts as assigned.
• A zero unassigned license count is impractical; keep a small buffer based on your hiring rate and purchasing capabilities.

What Is an Unassigned Microsoft 365 License?

An unassigned Microsoft 365 license is essentially a subscription seat that your organisation has paid for but hasn’t allocated to a user. Although you’re charged for it, it’s entirely unused until assigned. The available licenses can be discovered in the Microsoft 365 admin centre under Billing > Licenses, where you can view product listings alongside their assigned and available counts. The Entra admin centre displays similar information under Identity > Billing > Licenses.

Most unassigned licenses stem from common situations:

• An employee’s departure leads to their account being removed, returning the license to the pool.
• The procurement of more seats than necessary for a team, leaving excess licenses unassigned.
• When a set number of Copilot licenses remain unassigned due to delays in broader rollout plans.

As you explore the numbers, be aware that terminology can get confusing. Unassigned seats should not be confused with unused ones, which require distinct approaches for management.

Do Unassigned Microsoft 365 Licenses Cost Money?

Absolutely. Microsoft bases its charges on the total number of licenses purchased rather than those actively assigned. For example, if your tenant holds 40 unassigned Microsoft 365 E3 licenses, you’re looking at:

Cost Calculation:
40 unassigned seats x $39 (per user per month) = $1,560 per month, resulting in an annual expense of $18,720 for unused licenses.

Finding out about these unassigned seats doesn’t mean you’ll see immediate financial relief. In most annual subscriptions, you pay for the total quantity until the next renewal. So, even if you discover idle seats months into a term, the incurred costs remain locked in for a considerable period.

How to Identify Unassigned Licenses in Microsoft 365

To effectively manage unassigned licenses, follow these methods to compare purchased seats against assigned ones:

1. Using the Microsoft 365 Admin Centre

Navigate to Billing > Licenses within the admin centre to see every product you have, along with their assigned and available counts. This method works well if your tenant is small and only has a few SKUs.

2. Microsoft Graph PowerShell

For a tenant-wide view, utilise the Microsoft Graph PowerShell to query the subscribed SKUs and obtain a comprehensive report of any unassigned licenses. This is beneficial for larger organisations that need detailed insights:

Connect-MgGraph -Scopes "Organization.Read.All"
Get-MgSubscribedSku | Select-Object SkuPartNumber, CapabilityStatus, @{n='Purchased'; e={$_.PrepaidUnits.Enabled}}, ConsumedUnits, @{n='Unassigned'; e={[math]::Max(0, $_.PrepaidUnits.Enabled - $_.ConsumedUnits)}} | Sort-Object Unassigned -Descending

3. Implementing Turbo360

If you prefer a less manual approach, Turbo360 can automatically generate detailed documents summarising all Microsoft 365 SKUs along with their allocation and consumption stats, offering insights on unassigned licenses and more.

Why the Unassigned License Count Could Be Incorrect

Often, raw numbers fail to provide an accurate picture as they blend billable licenses with free or trial SKUs. Misunderstanding can lead to stress when discussing license waste, especially if trial licenses are mistaken as unassigned paid seats. Always ensure to filter out such non-billable items before presenting figures.

Strategies for Reclaiming Unassigned Licenses

Here’s a step-by-step guide to reclaiming unassigned licenses without causing disruption:

1. Reassign Prior to Purchasing: Before adding new licenses, check your available pool and reassign existing licenses where possible.
2. Convert Departing Employees’ Mailboxes to Shared: If the mailbox of a leaver is still required, convert it to a shared mailbox before removing their license. This ensures continuity without adding extra cost.
3. Clear out Group Licensing Errors: Ensure no users are stuck due to licensing issues. Fix the issue promptly in the Entra admin centre.
4. Avoid Duplicate Licenses: Remove redundant licenses that confuse the structure and contribute to unnecessary billing.

When Can You Reduce Your Microsoft 365 License Count?

It’s crucial to be aware of timeframes around your purchase or renewal date. Unassigning licenses doesn’t change your bill immediately; you must formally decrease the number of licenses on your subscription within specific windows, which generally lasts for only seven days post-purchase or renewal.

Preventing Future Buildup of Unassigned Licenses

It’s vital to implement strategies to prevent unassigned licenses from reaccumulating:

• Utilise role-based groups for license assignment.
• Implement a workflow that removes licenses as soon as employees leave.
• Set specific review dates for temporary add-ons.
• Coordinate your renewal calendar effectively across teams.

Key Metrics for Tracking Microsoft 365 Licenses

To manage your licenses effectively, consider monitoring these critical metrics:

• Seat Utilisation Rate
• Unassigned Seats Above Buffer
• Disabled but Licensed Count
• Days to Reclaim a License
• Add-On Activity Rate

By keeping these metrics in check and maintaining a structured approach, you’ll ensure a more efficient Microsoft 365 license management process, saving costs and utilising resources effectively.