M365 Licensing Fundamentals — Models, Billing & Purchase Channels
Understand Microsoft 365 licensing from the ground up: per-user vs per-device models, subscription vs perpetual, annual vs monthly billing, and how to choose between CSP, Volume Licensing, and Web Direct.
Key Facts
- Microsoft has transitioned over 400 million commercial users to the subscription model, making it the default for new deployments.
- Three primary purchase channels exist: Cloud Solution Provider (CSP), Volume Licensing (EA/MPSA), and Web Direct — each with distinct pricing, support, and flexibility tradeoffs.
- Annual commitment pricing saves roughly 20% compared to month-to-month billing on the same plan.
- Most Microsoft 365 licenses are per-user, not per-device — a single license covers up to 5 PCs, 5 tablets, and 5 phones for that user.
- The Microsoft 365 Admin Center is the central hub for assigning, removing, and tracking license consumption across your tenant.
- Assigned licenses (seats you pay for) and consumed licenses (seats actually in use) often differ — auditing this gap is the fastest way to cut costs.
What Is Microsoft 365 Licensing?
Microsoft 365 licensing is the framework Microsoft uses to grant your organization access to its cloud productivity, security, and collaboration tools. Unlike the old days of buying a boxed copy of Office, M365 licensing is subscription-based — you pay per user per month for access to a bundle of services.
Understanding this framework is not optional. Get it wrong and you either overspend (the more common scenario) or leave critical security features turned off because nobody realized they were included in your current plan.
The Three Licensing Models
1. Per-User Licensing (Most Common)
The vast majority of M365 plans are licensed per user. One license = one person. That person can install Office apps on up to 5 PCs/Macs, 5 tablets, and 5 phones. The license follows the user, not the device.
This is a fundamental shift from the old volume licensing model where you bought per-device licenses. Microsoft made this change because the average knowledge worker now uses 3.2 devices for work.
2. Per-Device Licensing (Niche Cases)
A few scenarios still use device-based licensing. Windows 365 licenses a cloud PC instance. Teams Rooms licenses a conference room device. Shared device mode in Intune handles kiosk-style deployments.
If you have shift workers sharing a tablet on a factory floor, look at Frontline plans (F1/F3) which support shared device mode rather than buying individual licenses for each worker who touches that device.
3. Add-On Licensing
Add-ons bolt onto a base license. You cannot buy Microsoft 365 Copilot ($30/user/month) without first having an E3, E5, Business Standard, or Business Premium base license. The same logic applies to Defender for Endpoint P2, Teams Phone, Intune Suite, and dozens of other add-ons.
The critical rule: always check the prerequisites. Microsoft's documentation lists which base plans qualify for each add-on. Getting this wrong is one of the most common (and expensive) licensing mistakes.
Subscription vs. Perpetual
Microsoft still sells Office LTSC (Long Term Servicing Channel) as a one-time purchase — currently Office LTSC 2024. But it only includes the desktop apps (Word, Excel, PowerPoint, Outlook) with no cloud services, no Teams, no Exchange Online, no security features, and no ongoing updates beyond security patches.
For 95%+ of organizations, the subscription model (M365) is the right choice. You get continuous feature updates, cloud storage, email hosting, security tools, and phone support — all included. The perpetual license makes sense only for isolated or air-gapped environments that cannot connect to the cloud. If you are currently on perpetual Office and considering the switch, our Office 365 migration team handles the full transition including mailbox provisioning, data migration, and user onboarding.
Purchase Channels: CSP vs. Volume Licensing vs. Web Direct
Cloud Solution Provider (CSP)
This is how most small and mid-size organizations buy M365. You purchase through a Microsoft partner (like Medha Cloud) who manages your subscription, provides support, and often bundles Microsoft 365 migration services at no extra cost. CSP pricing can be more competitive than buying direct, and you get a single point of contact for issues — from initial Exchange migration through ongoing license management.
Enterprise Agreement (EA) / Volume Licensing
For organizations with 500+ users, an Enterprise Agreement offers the deepest discounts and most flexibility. EAs are typically 3-year commitments with annual true-ups. You negotiate pricing directly with Microsoft or a Large Account Reseller (LAR).
Web Direct
Buying straight from microsoft.com. This is the simplest but most expensive option. You pay list price with no negotiation. Suitable for very small teams (under 10 users) who do not want a partner relationship.
Annual vs. Monthly Commitment
Microsoft offers two commitment terms under the New Commerce Experience (NCE):
Annual Commitment
Lock in for 12 months. Save roughly 20% compared to monthly. You can add seats mid-term but cannot reduce until renewal. This is the right choice for stable organizations.
Monthly Commitment
Full flexibility — add or remove licenses any month. But you pay a 20% premium for that flexibility. Best for seasonal businesses, project-based teams, or while evaluating a new plan.
Pro Tip
Most organizations should default to annual commitment and only use monthly for a small pool of "flex" licenses (5-10% of total) to handle contractors and seasonal hires.
How Microsoft Counts Users
Microsoft bills based on assigned licenses, not consumed. If you assign 100 E3 licenses but only 60 people actively use them, you still pay for 100. This is why regular license audits are essential — Chapter 11 covers this in detail.
The M365 Admin Center shows you a usage report: which users have logged in within the last 30/90/180 days and which features they actually use. Run this report quarterly to find waste.
Did You Know?
Microsoft has transitioned over 400 million commercial users to the subscription model, making it the default for new deployments.
Test Your Knowledge
Question 1 of 4
A Microsoft 365 Business Standard license allows installation on how many devices per user?
Chapter Summary
- 1Microsoft 365 uses four licensing models: per-user subscription (most common), per-device (shared scenarios), add-on (extends a base plan), and trial (30-day evaluation with full features).
- 2Subscription licensing means you pay monthly or annually for as long as you need the service; perpetual licensing (Office LTSC 2024) is a one-time purchase with no cloud services and limited feature updates.
- 3Annual commitment locks in a per-user/month price that is significantly lower than the monthly no-commitment equivalent — but you are billed for the full term even if you reduce seats mid-cycle.
- 4Microsoft bills based on assigned licenses. If you provision 200 E3 seats but only 170 people sign in, you still pay for 200. Regular license utilization audits are essential.
- 5CSP is the best channel for most SMBs (flexible terms, partner support). Enterprise Agreements suit organizations with 500+ users who want price predictability. Web Direct is convenient but offers no volume discounts.
- 6Volume Licensing programs (EA, MPSA, Select Plus) are being consolidated — Microsoft is pushing most customers toward CSP or direct Microsoft Customer Agreements (MCA).
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