This chapter covers Microsoft 365 licensing plans, a core topic for the MS-900 exam. Understanding the differences between Enterprise, Business, and Frontline plans, as well as add-ons and subscription options, is essential because licensing questions appear frequently—roughly 15-20% of the exam focuses on pricing and licensing (objective domain 4.1). You will need to identify which plan suits a given scenario, understand what each plan includes, and recognize the licensing requirements for specific workloads like Microsoft 365 Copilot, Power BI, or advanced compliance features.
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Think of Microsoft 365 licensing plans like a restaurant's buffet menu system. The restaurant (Microsoft) offers several buffet tiers: Basic (soup and salad only), Standard (full hot buffet), Premium (buffet plus steak station), and Enterprise (buffet, steak, seafood, and dessert bar). Each tier includes a specific set of food items (services/apps). You pay a set price per person per month. If you want a dessert bar item (e.g., Power BI Pro), you cannot just add it to a Basic plan; you must upgrade the entire person to a higher tier or buy a separate 'a la carte' add-on (standalone license). The restaurant tracks how many people are at each tier and bills accordingly. You cannot mix and match individual items across tiers for the same person—each person is assigned exactly one plan. However, you can have different people on different tiers. The menu (licensing options) changes periodically, and legacy items (e.g., Office 365 E1) may be grandfathered but no longer sold. This analogy directly mirrors how Microsoft 365 licensing works: plans bundle services, per-user assignment, no mixing within a user, and add-ons for specific capabilities.
Overview of Microsoft 365 Licensing Plans
Microsoft 365 licensing is structured around per-user, subscription-based plans. Each plan bundles a set of cloud services (Exchange Online, SharePoint, Teams, etc.) and desktop applications (Office apps). The three main categories are Enterprise (E), Business (B), and Frontline (F). There are also standalone plans for specific workloads.
Enterprise Plans (E3, E5)
Enterprise plans are designed for organizations with 300+ users (though no hard minimum) and offer full IT control, advanced security, and compliance capabilities.
Microsoft 365 E3: Includes core productivity apps (Word, Excel, PowerPoint, Outlook, OneNote, Publisher, Access), Exchange Online (100 GB mailbox), SharePoint Online, OneDrive for Business (1 TB/user), Teams, and basic security features (multi-factor authentication, conditional access via Azure AD P1). It also includes Windows 10/11 Enterprise and Enterprise Mobility + Security (EMS) E3.
Microsoft 365 E5: Everything in E3 plus advanced security (Microsoft Defender for Office 365 Plan 2, Microsoft 365 Defender), advanced compliance (eDiscovery, retention policies, communication compliance, insider risk management), advanced analytics (Power BI Pro, MyAnalytics), and Azure AD P2 (identity protection, privileged identity management). It also includes voice capabilities (Phone System, Audio Conferencing).
Key exam points: E5 includes Power BI Pro; E3 does not. E5 includes Audio Conferencing; E3 does not. E5 includes Microsoft 365 Copilot eligibility (additional license required).
Business Plans (Business Basic, Standard, Premium)
Business plans target small and medium businesses (up to 300 users). They have simplified management and fewer advanced features.
Microsoft 365 Business Basic: Web and mobile versions of Office apps only (no desktop apps). Includes Exchange Online (50 GB mailbox), SharePoint, OneDrive (1 TB/user), Teams. No Azure AD P1, no Windows 10/11 Enterprise. This is the entry-level plan.
Microsoft 365 Business Standard: Everything in Business Basic plus desktop versions of Office apps (full installed apps on up to 5 PCs/Macs and 5 tablets per user). This is the most common plan for SMBs.
Microsoft 365 Business Premium: Everything in Business Standard plus advanced security and device management (Microsoft Defender for Business, Azure AD P1, Intune, conditional access, information protection). It is essentially Business Standard + security features.
Key exam points: Business Premium includes Azure AD P1 and Intune; Business Standard does not. Business Basic does not include desktop Office apps. Business plans max at 300 users; beyond that, must use Enterprise plans.
Frontline Plans (F1, F3)
Frontline plans are for deskless workers—retail, hospitality, manufacturing—who need communication and task management but not full Office apps.
Microsoft 365 F1: Includes web-only Office apps, Exchange Online (2 GB mailbox), SharePoint, Teams, and core security (basic identity and access management). No desktop apps, no OneDrive (only SharePoint). Very limited storage.
Microsoft 365 F3: Includes web and mobile Office apps, Exchange Online (10 GB mailbox), SharePoint, OneDrive (2 GB/user), Teams, and basic compliance. Still no desktop apps. F3 is a step up from F1 but still limited.
Key exam points: Frontline plans have drastically reduced mailbox and OneDrive storage. They do not include desktop Office apps. They are per-user, per-month, and are often used for shift workers.
Add-on Licenses
Add-ons are additional licenses that can be assigned to users who already have a base plan. They extend capabilities without changing the base plan.
Microsoft 365 Copilot: Requires an E3 or E5 base plan (or Business Premium/Standard? Actually, Copilot for Microsoft 365 is available for E3, E5, Business Standard, Business Premium, and Frontline F3). Adds AI assistance across apps. Cost: $30/user/month (as of 2025).
Power BI Pro: Included in E5; otherwise requires a standalone license ($10/user/month) or as an add-on to other plans.
Microsoft 365 E5 Compliance: Add-on for E3 to gain E5 compliance features (eDiscovery, retention, etc.).
Microsoft 365 E5 Security: Add-on for E3 to gain E5 security features (Defender for Office 365 Plan 2, etc.).
Audio Conferencing: Included in E5; add-on for E3 or Business plans ($4/user/month).
Phone System: Included in E5; add-on for E3 or Business plans ($8/user/month).
Microsoft Teams Phone Standard: Included in E5; add-on for others.
Microsoft 365 Apps for Enterprise (formerly ProPlus): Standalone plan for desktop Office apps only (no Exchange, SharePoint, etc.).
Microsoft 365 Apps for Business: Similar but for up to 300 users, no enterprise features.
Important: Some add-ons require a specific base plan (e.g., E5 Compliance requires E3). Many add-ons are per-user.
Education and Government Plans
Microsoft offers special plans for education (A1, A3, A5) and government (G1, G3, G5) with similar tiers but adjusted pricing and compliance. For the exam, know that education plans are free or heavily discounted and include A1 (web apps), A3 (desktop apps), A5 (full suite). Government plans are GCC, GCC High, and DoD—each with increasing compliance requirements.
Subscription Types
Monthly vs Annual: Annual subscriptions are cheaper per month but require a one-year commitment. Monthly allows flexibility at higher cost.
CSP (Cloud Solution Provider): Purchased through a partner; offers flexibility and bundled services.
Direct (EA/EAS): Enterprise Agreement for large organizations; typically annual.
Pay-as-you-go: For some standalone services (e.g., Power BI Premium per capacity).
Licensing per User vs per Device
Microsoft 365 is primarily per-user. However, some plans (like Microsoft 365 Apps for Enterprise) offer per-device licensing for shared computers (e.g., in hospitals or factories). Per-device licensing is less common and not a focus of MS-900.
Common Licensing Scenarios on the Exam
A company with 500 users that needs desktop Office apps, email, and basic security: choose Microsoft 365 E3.
A small business of 50 users needing desktop apps and email: Microsoft 365 Business Standard.
A retail chain with 1000 shift workers who only need email and Teams: Microsoft 365 F3.
A company needing advanced compliance and Power BI: Microsoft 365 E5.
A company that already has E3 but wants AI assistance: add Microsoft 365 Copilot.
Trap Patterns
Mixing plans incorrectly: You cannot assign a Power BI Pro license to a user with Business Basic and expect it to work for desktop Power BI? Actually, Power BI Pro is a standalone license that can be added to any plan that includes Power BI service (which all do?). But Power BI Pro requires a base plan that includes Office? No, Power BI Pro is independent. However, for full integration, a base plan is recommended. The trap is that some candidates think you need E5 to get Power BI Pro—but it is available as an add-on to E3, Business Standard, etc.
Storage limits: Frontline plans have tiny mailboxes (2 GB or 10 GB). The exam may ask which plan is appropriate for a user who needs 50 GB mailbox.
Desktop apps: Business Basic and F1/F3 do not include desktop Office apps. Many candidates forget this.
300-user limit: Business plans cap at 300 users. If an organization has 400 users, they must use Enterprise plans.
Audio Conferencing vs Phone System: Audio Conferencing allows dial-in to meetings; Phone System provides a full PBX with calling plans. E5 includes both; E3 includes neither but can add them.
Verification and Tools
Microsoft 365 Admin Center: Billing > Licenses to view and assign licenses.
Microsoft 365 Licensing Service: Programmatic check via APIs.
M365 Maps: Community tool to compare plans.
PowerShell: Get-MsolAccountSku to list licensed SKUs in a tenant.
Interaction with Related Technologies
Azure AD: License assignment determines which Azure AD features are available (e.g., P1 or P2).
Microsoft 365 Defender: Only available in E5 or via add-on.
Compliance Center: Advanced compliance features require E5 or E5 Compliance add-on.
Power BI: Pro license needed for sharing and collaboration; Free license only allows viewing.
Specific Numbers and Defaults
Exchange Online mailbox: E3/E5 = 100 GB, Business Standard = 50 GB, F3 = 10 GB, F1 = 2 GB.
OneDrive storage: E3/E5 = 1 TB/user (expandable), Business Standard = 1 TB, F3 = 2 GB, F1 = 0 (no OneDrive).
Desktop Office apps: E3/E5, Business Standard, Business Premium include them; Business Basic, F1, F3 do not.
Maximum users for Business plans: 300.
Maximum users for Enterprise plans: unlimited.
Copilot cost: $30/user/month (requires E3, E5, Business Standard, Business Premium, F3).
Power BI Pro cost: $10/user/month (included in E5).
Audio Conferencing: $4/user/month (included in E5).
Phone System: $8/user/month (included in E5).
Exam Tip: The exam often presents a scenario with specific user count and needs. Identify the plan that meets all requirements at the lowest cost. Remember that add-ons can supplement but not replace base plan features. If a user needs desktop Office apps, choose a plan that includes them (Business Standard or higher, or Enterprise E3/E5). If they need advanced security, choose Business Premium, E3 with security add-on, or E5. If they need compliance, choose E5 or E3 with compliance add-on. For frontline workers, F3 is typically the best balance.
Identify User Requirements
Start by listing what each user needs: desktop Office apps? Email? SharePoint? Teams? Advanced security? Compliance? Power BI? Copilot? Also note the total number of users. This step is critical because the exam will present a scenario with specific needs. For example, a user might need only email and Teams (no desktop apps) — then Business Basic or F3 could be appropriate. Another user might need full Office apps and email — then Business Standard or E3. Document every requirement before selecting a plan.
Determine User Category
Classify users as information workers (need full productivity suite), frontline workers (need communication and task management only), or executives (need advanced analytics and security). This maps to Enterprise/Business vs Frontline plans. For example, a retail cashier is a frontline worker; a corporate manager is an information worker. The exam often tests this distinction: if a user is described as 'deskless' or 'shift worker,' consider Frontline plans.
Select Base Plan
Based on requirements and user count, choose a base plan. For information workers: if under 300 users and need desktop apps, Business Standard or Premium; if over 300 or need advanced features, E3 or E5. For frontline workers: F3 (more features) or F1 (basic). Ensure the plan includes all mandatory features. For example, if a user needs a 100 GB mailbox, you must pick an Enterprise plan (E3/E5) because Business plans offer only 50 GB. If a user needs desktop Office apps, Business Standard or higher is required.
Evaluate Add-On Needs
Check if the base plan lacks any required features that can be added via add-on licenses. Common add-ons: Power BI Pro (if not E5), Audio Conferencing, Phone System, Microsoft 365 Copilot, E5 Compliance, E5 Security. Add-ons are per-user and increase monthly cost. The exam may ask: 'Which additional license is needed to enable eDiscovery?' Answer: E5 Compliance add-on (if base is E3) or E5 itself. Do not confuse add-ons with base plan upgrades.
Assign Licenses and Validate
In the Microsoft 365 Admin Center, assign the chosen base plan and any add-ons to each user. Validate that the user can access all required services. For example, after assigning an E3 license, verify that the user can install Office desktop apps. For add-ons like Power BI Pro, check that the Power BI service shows 'Pro' status. The exam does not test the admin UI steps, but you should know the licensing structure to answer scenario-based questions.
Enterprise Scenario: Global Corporation with 10,000 Employees
A multinational company needs to deploy Microsoft 365 across all users. Information workers (8,000) require desktop Office apps, email, Teams, and basic security. They also need Power BI Pro for data analysts (500 users) and advanced compliance for legal team (100 users). The remaining 2,000 are frontline workers (retail staff) who need only email and Teams on mobile devices.
Solution: Assign Microsoft 365 E3 to all information workers (8,000). For the 500 analysts, add Power BI Pro add-on licenses. For the 100 legal users, add E5 Compliance add-on (or upgrade to E5 if cost-effective). For the 2,000 frontline workers, assign Microsoft 365 F3 (includes mobile Office apps, 10 GB mailbox, Teams). This mix optimizes cost while meeting requirements.
Common Pitfall: Attempting to use Business plans for the 8,000 information workers fails because Business plans max at 300 users. Also, upgrading everyone to E5 is unnecessarily expensive. The add-on approach is more cost-effective.
SMB Scenario: 150-User Consulting Firm
A consulting firm with 150 users needs desktop Office apps, email, Teams, and device management (Intune) for company-issued laptops. They also need basic compliance features (retention policies).
Solution: Microsoft 365 Business Premium fits perfectly: includes desktop apps, Exchange, SharePoint, Teams, Intune, and Azure AD P1. It also includes basic compliance (retention labels via Microsoft Purview? Actually, Business Premium includes some compliance features like retention, but advanced eDiscovery requires E5 or add-on). For this firm, Business Premium covers all needs. No add-ons required.
Common Pitfall: Choosing Business Standard and then adding Intune separately (Intune is not available as an add-on to Business Standard; you would need Enterprise Mobility + Security, which is essentially what Business Premium includes). So Business Premium is the correct single plan.
Frontline Scenario: 500-User Retail Chain
A retail chain has 500 store associates who need access to schedules, company news, and email on shared tablets. They do not need desktop Office apps. Managers (50 users) need full Office apps and email.
Solution: Assign Microsoft 365 F3 to store associates (500). F3 provides web and mobile Office apps, 10 GB mailbox, and Teams. For managers, assign Microsoft 365 Business Standard (since under 300, but they are 50, so okay) or E3 if over 300 total? Actually, the total is 550, so Business plans cannot be used for anyone because the tenant has >300 users? Wait: Business plans can be used for any user up to 300 total per tenant? The 300 limit is per organization, not per plan. If the organization has more than 300 users, they cannot purchase any Business plan licenses, even for a subset. So this company with 550 users must use Enterprise plans for all users. Therefore, associates get F3, managers get E3 (or E5). This is a key exam trap: the 300-user limit applies to the entire tenant, not per plan.
Common Pitfall: Assuming you can mix Business and Enterprise plans in a tenant with >300 users. You cannot. Once the tenant exceeds 300 users, all users must be on Enterprise or Frontline plans.
Performance and Scale Considerations
In large tenants, license assignment via PowerShell is recommended to automate bulk operations. Use New-MsolLicenseAssignment or Set-MsolUserLicense. For hybrid environments, license assignment can be synced from on-premises Active Directory using Azure AD Connect. Misconfiguration can lead to users losing access to services if licenses are removed or expired. Always audit license usage regularly to avoid compliance issues.
MS-900 Objective 4.1: Describe Microsoft 365 pricing and licensing options
This objective covers: (1) differences between Enterprise, Business, Frontline plans; (2) add-on licenses; (3) subscription options (monthly vs annual, CSP, EA); (4) licensing for specific workloads (Copilot, Power BI, etc.). Expect 3-5 questions on the exam.
Most Common Wrong Answers
Choosing Business Standard for a user who needs desktop Office apps but also advanced security – The correct answer is Business Premium, which includes Intune and Azure AD P1. Candidates often overlook that Business Standard lacks security features.
Selecting E3 for a user who needs Power BI Pro – Power BI Pro is not included in E3; candidates forget that E5 includes it or that a Power BI Pro add-on is needed.
Assigning F1 to a user who needs mobile Office apps – F1 does not include mobile Office apps (only web). F3 is the correct Frontline plan for mobile apps.
Using Business plans in a tenant with 400 users – The 300-user limit is a hard cap; Enterprise plans are required.
Thinking Audio Conferencing is included in E3 – It is included only in E5. E3 users need an add-on.
Specific Values and Terms That Appear Verbatim
'Microsoft 365 Business Basic' (web apps only)
'Microsoft 365 Business Standard' (desktop apps)
'Microsoft 365 Business Premium' (desktop apps + security)
'Microsoft 365 E3' (core enterprise)
'Microsoft 365 E5' (advanced security, compliance, analytics)
'Microsoft 365 F3' (frontline with mobile apps)
'Microsoft 365 F1' (frontline web only)
Add-on: 'Microsoft 365 Copilot' ($30/user/month)
Add-on: 'Power BI Pro' ($10/user/month, included in E5)
Add-on: 'Audio Conferencing' ($4/user/month)
Add-on: 'Phone System' ($8/user/month)
Storage: E3/E5 mailbox 100 GB, Business Standard 50 GB, F3 10 GB, F1 2 GB
OneDrive: E3/E5 1 TB, Business Standard 1 TB, F3 2 GB, F1 none
User limit: Business plans max 300 users per tenant
Edge Cases and Exceptions
Education plans: Free for faculty and students (A1 for web, A3 for desktop, A5 for full). The exam may ask which plan is appropriate for a school.
Government plans: GCC, GCC High, DoD – higher compliance. Not typically tested in depth, but know they exist.
Per-device licensing: For shared computers (e.g., Microsoft 365 Apps for Enterprise per device). Rarely tested.
Trial licenses: 30-day trials available for most plans. Not a licensing plan per se, but could appear.
Add-ons that require specific base plans: E5 Compliance add-on requires E3; Copilot requires E3, E5, Business Standard, Business Premium, or F3.
How to Eliminate Wrong Answers
Read the user count: If >300, eliminate all Business plans.
Check for desktop apps requirement: If needed, eliminate Business Basic, F1, F3.
Check for advanced security: If needed, ensure the plan includes Azure AD P1 (Business Premium or E3+) or Intune (Business Premium or E3+).
Check for advanced compliance: If needed, plan must be E5 or E3 + E5 Compliance add-on.
Check for Power BI: If needed, plan must be E5 or include Power BI Pro add-on.
Check for Copilot: If needed, base plan must be one of the eligible ones (E3, E5, Business Standard, Business Premium, F3).
Remember storage limits: If user needs >10 GB mailbox, Frontline F1/F3 are out. If >50 GB, Business plans are out.
By systematically applying these filters, you can narrow down to the correct plan.
Microsoft 365 plans are per-user, per-month subscriptions that bundle services and apps.
Enterprise plans (E3, E5) have no user limit; Business plans (Basic, Standard, Premium) max at 300 users per tenant.
Frontline plans (F1, F3) are for deskless workers with reduced storage and no desktop Office apps.
E5 includes Power BI Pro, Audio Conferencing, Phone System, advanced security, and advanced compliance.
Add-ons like Copilot ($30/user/month) and Power BI Pro ($10/user/month) extend base plans.
Desktop Office apps are included in Business Standard, Business Premium, E3, and E5; not in Business Basic, F1, or F3.
Exchange Online mailbox sizes: E3/E5 100 GB, Business Standard 50 GB, F3 10 GB, F1 2 GB.
OneDrive storage: E3/E5 1 TB, Business Standard 1 TB, F3 2 GB, F1 none.
Microsoft 365 Copilot requires a qualifying base plan (E3, E5, Business Standard, Business Premium, or F3).
Business Premium includes Intune and Azure AD P1; Business Standard does not.
Audio Conferencing ($4/user/month) and Phone System ($8/user/month) are included in E5 but are add-ons for other plans.
The 300-user limit for Business plans is a hard tenant-wide restriction; exceeding it forces use of Enterprise or Frontline plans.
These come up on the exam all the time. Here's how to tell them apart.
Microsoft 365 Business Standard
Up to 300 users per tenant
Desktop Office apps included
Exchange Online 50 GB mailbox
OneDrive 1 TB/user
No Azure AD P1 (no conditional access), no Intune
Microsoft 365 E3
No user limit (unlimited)
Desktop Office apps included
Exchange Online 100 GB mailbox
OneDrive 1 TB/user (expandable)
Includes Azure AD P1 and Intune (Enterprise Mobility + Security E3)
Microsoft 365 E3
Core productivity and email
Basic security (Azure AD P1, MFA)
No Power BI Pro
No advanced compliance (eDiscovery, retention)
No Audio Conferencing or Phone System
Microsoft 365 E5
All E3 features
Advanced security (Microsoft 365 Defender, Defender for Office 365 Plan 2)
Includes Power BI Pro
Includes advanced compliance (eDiscovery, communication compliance, insider risk)
Includes Audio Conferencing and Phone System
Microsoft 365 F3 (Frontline)
Web and mobile Office apps (no desktop)
Exchange Online 10 GB mailbox
OneDrive 2 GB/user
Teams included
No Azure AD P1
Microsoft 365 Business Basic
Web only Office apps (no mobile apps? Actually mobile apps are included in Business Basic? Business Basic includes mobile apps for Outlook, Teams, etc., but not full Office mobile apps? Clarify: Business Basic includes web and mobile versions of Office apps, but not desktop. So both have web and mobile. The key difference is storage and price.)
Exchange Online 50 GB mailbox
OneDrive 1 TB/user
Teams included
No Azure AD P1
Mistake
Microsoft 365 Business Premium includes all features of Enterprise E5.
Correct
Business Premium includes security features (Intune, Azure AD P1) but not advanced compliance (eDiscovery, insider risk management), advanced analytics (Power BI Pro), or voice capabilities (Phone System, Audio Conferencing). E5 is far more comprehensive.
Mistake
You can assign any add-on to any base plan.
Correct
Some add-ons require specific base plans. For example, E5 Compliance add-on requires Microsoft 365 E3. Copilot requires E3, E5, Business Standard, Business Premium, or F3. Always check prerequisites.
Mistake
Frontline plans include desktop Office apps.
Correct
F1 and F3 do not include desktop Office apps. They include web and mobile versions only. Desktop apps require Business Standard, Business Premium, or Enterprise plans.
Mistake
Business plans can be used in organizations with more than 300 users as long as you only assign them to a subset of users.
Correct
The 300-user limit is per tenant. If your organization has more than 300 total users, you cannot purchase or assign any Business plan licenses, even if only 200 users would use them. All users must be on Enterprise or Frontline plans.
Mistake
Power BI Pro is only available with E5.
Correct
Power BI Pro is included in E5, but it is also available as a standalone add-on for any base plan (E3, Business Standard, etc.) for an additional $10/user/month.
Reveal each answer, then mark whether you got it right. Score 60%+ to unlock the next chapter.
E5 includes everything in E3 plus advanced security (Microsoft 365 Defender, Defender for Office 365 Plan 2), advanced compliance (eDiscovery, communication compliance, insider risk management), advanced analytics (Power BI Pro, MyAnalytics), and voice capabilities (Audio Conferencing, Phone System). E3 lacks these. If you need Power BI Pro or advanced compliance, choose E5 or add the corresponding add-on to E3.
No. Business plans are limited to 300 users per tenant. For 500 users, you must use Enterprise plans (E3 or E5) or a combination of Enterprise and Frontline plans. This is a common exam trap.
No. Business Basic includes only web and mobile versions of Office apps. To get desktop apps (Word, Excel, etc.), you need Business Standard, Business Premium, or an Enterprise plan (E3/E5).
Microsoft 365 Copilot is an add-on license costing $30/user/month. It requires a qualifying base plan: Microsoft 365 E3, E5, Business Standard, Business Premium, or F3. It cannot be added to Business Basic or F1.
Microsoft 365 F3 provides a 10 GB mailbox; F1 provides a 2 GB mailbox. In comparison, Business Standard provides 50 GB, and Enterprise plans provide 100 GB.
Business Premium adds advanced security and device management: Azure AD P1 (conditional access, identity protection), Intune (mobile device management), Microsoft Defender for Business, and information protection (DLP, sensitivity labels). Business Standard has none of these.
Yes. Power BI Pro is available as a standalone add-on for $10/user/month. It is included in E5 but not in E3. You can assign the Power BI Pro add-on to any user with an E3 license (or any qualifying base plan).
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