Users, Groups & Licensing
Every person in your organisation is a user. Every user needs licenses. And groups make managing hundreds of users practical instead of painful.
Users, groups, and licenses — the foundation
Think of your M365 tenant as a theme park.
Users are the visitors — each person has a unique ticket (account). Licenses are the wristbands that unlock different rides — a basic wristband gets you the free rides (Exchange, Teams), a premium wristband adds the VIP experiences (Copilot, advanced compliance).
Groups are tour groups — instead of giving each visitor their wristband individually, you say “everyone in the Marketing tour group gets the premium wristband.” When a new person joins the tour, they automatically get the wristband too.
And admin roles are like staff badges — the park manager can do everything, but the ride operator can only manage their specific ride.
Group types in Microsoft 365
| Feature | Purpose | Email? | SharePoint Site? | Best For |
|---|---|---|---|---|
| Microsoft 365 Group | Collaboration + shared resources | Teams, projects, departments | ||
| Security group | Access control + license assignment | Permissions, CA policies, license groups | ||
| Mail-enabled security group | Security + email distribution | Groups that need both permissions AND email | ||
| Distribution group | Email distribution only | Email lists (all-staff@, marketing@) |
Exam tip: When the question says “assign Copilot licenses to a department” → use a security group or M365 Group with group-based licensing. When it says “send email to all staff” → use a distribution group. Know the difference.
How licensing works
License hierarchy
Microsoft 365 E5 (the plan)
├── Exchange Online (email)
├── SharePoint Online (files)
├── Teams (collaboration)
├── Microsoft Entra ID P2 (premium identity)
├── Microsoft Purview (compliance)
├── Microsoft Defender (security)
└── ...plus 20+ more servicesEach plan includes specific service plans (individual features). Admins can toggle individual service plans on/off per user if needed.
Microsoft 365 Copilot — an add-on license
Copilot is NOT included in E3/E5 — it’s a separate add-on license (Microsoft 365 Copilot) that requires a qualifying base plan (M365 Business Standard/Premium, E3, or E5).
Scenario: Maya licenses Northwave
Northwave’s 500 employees:
| Role | Count | License | Copilot? |
|---|---|---|---|
| Knowledge workers | 200 | M365 E5 | ✅ Copilot add-on (monthly) |
| Field engineers | 50 | M365 E3 | ✅ Copilot add-on (pay-as-you-go) |
| Frontline staff | 200 | M365 F3 | ❌ No Copilot |
| Executives | 10 | M365 E5 | ✅ Copilot add-on (monthly) |
| Contractors | 40 | M365 E3 | ❌ No Copilot |
Maya uses security groups for each category → assigns licenses at the group level → new hires automatically get the right license.
Admin roles — RBAC
The exam tests whether you know: don’t give everyone Global Admin.
| Feature | What They Can Do | Use Case |
|---|---|---|
| Global Administrator | Everything — full control over the entire tenant | Only 2-3 people (break-glass accounts) |
| User Administrator | Create/manage users, reset passwords, manage groups | Helpdesk, IT support |
| License Administrator | Assign and manage licenses | IT ops, procurement |
| Exchange Administrator | Manage Exchange Online settings | Email admin |
| SharePoint Administrator | Manage SharePoint sites and settings | Site admin |
| Teams Administrator | Manage Teams settings, policies, channels | Teams admin |
| Security Administrator | Manage security policies, Defender settings | Security team |
| Compliance Administrator | Manage Purview compliance features | Compliance officer |
| Billing Administrator | Manage billing, subscriptions, invoices | Finance/procurement |
Least privilege — the golden rule
Never give more access than needed. This is tested in every security-related exam question.
Bad: Everyone in IT is a Global Admin Good: Maya = User Admin + License Admin. Jordan (CISO) = Security Admin. Priya = Compliance Admin. Only the CTO has Global Admin (and a break-glass account).
Why it matters: A compromised Global Admin account can wipe the entire tenant. A compromised User Admin can only reset passwords. Limit the blast radius.
Where to assign: M365 admin center → Users → Active users → Manage roles. Or Microsoft Entra admin center → Roles and administrators.
🎬 Video walkthrough
🎬 Video coming soon
Users, Groups & Licensing — AB-900 Module 5
Users, Groups & Licensing — AB-900 Module 5
~10 minFlashcards
Knowledge Check
Northwave needs to assign Microsoft 365 E5 licenses to all 200 knowledge workers. New hires should automatically get the license. What's the best approach?
Maya needs to manage Exchange Online settings but should NOT have access to SharePoint or Teams admin functions. Which role should she be assigned?
Next up: Zero Trust — the security philosophy that Microsoft 365 is built on, and why it matters for every admin decision.