Office 365 E3 vs E5 in 2026 — Complete Feature Comparison for Indian Enterprises

Every IT leader evaluating Microsoft licensing in India eventually lands on the same question: is Office 365 E5 worth the premium over E3? The answer is not a simple yes or no — it depends entirely on your security posture, compliance obligations, and whether you are already paying for third-party tools that E5 bundles for free.

This guide breaks down every feature difference between Office 365 E3 and E5, explains what the upgrade actually gives you, and helps you decide which plan — or which mix of both — makes sense for your organisation. All context is specific to Indian enterprises buying through Microsoft CSP partners.

Quick Context: Office 365 vs Microsoft 365

Before we dive in, a critical distinction that trips up many buyers:

• Office 365 E3/E5 — productivity + collaboration + some security. This is what we are comparing here.
• Microsoft 365 E3/E5 — everything in Office 365 E3/E5 plus Windows 11 Enterprise license + Microsoft Intune (device management) + Entra ID P1 (for M365 E3) or P2 (for M365 E5).

If your users already have Windows Enterprise licenses through volume licensing or SA, Office 365 plans often make more sense commercially. If you need Intune and Entra ID bundled in, look at Microsoft 365 plans instead.

Productivity and Collaboration — Identical in Both Plans

Good news first: every core productivity feature is identical in E3 and E5. There is zero difference in the tools your users interact with daily:

The only productivity difference is Power BI Pro, which is exclusive to E5. Power BI Pro licenses cost approximately 700 per user per month if purchased standalone — so for organisations that need business intelligence across all users, E5 effectively bundles this free.

Security and Threat Protection — Where E5 Pulls Ahead

This is the biggest differentiator and the primary reason enterprises upgrade to E5. The security stack included in E5 would cost significantly more if purchased as standalone add-ons.

*Important note: Entra ID P1 (formerly Azure AD P1) is not included in either Office 365 E3 or E5. It is included in Microsoft 365 E3. This catches many buyers off guard. If you need Conditional Access policies (and most enterprises do), you either need the M365 E3 upgrade or a standalone Entra ID P1 add-on.

What the Defender Stack Actually Does

The E5 security features are not checkboxes — they form an integrated threat detection and response system:

• Defender for Office 365 Plan 1 + Plan 2: Every email link and attachment is detonated in a sandbox before delivery. Threat Explorer lets your security team investigate phishing campaigns across the entire organisation. AIR automates investigation of alerts so your analysts are not drowning in false positives. Attack Simulation Training lets you run phishing simulations against your own users — invaluable for security awareness programmes required under RBI, SEBI CSCRF, and ISO 27001.
• Defender for Endpoint: Full endpoint detection and response (EDR) across Windows, macOS, Linux, iOS, and Android. Automated threat investigation, vulnerability management, and the ability to remotely isolate compromised machines. This directly competes with CrowdStrike Falcon and SentinelOne.
• Defender for Identity: Monitors your on-premises Active Directory for signs of compromise — credential theft, lateral movement, privilege escalation. Critical for hybrid environments where AD is the crown jewel attackers target.
• Defender for Cloud Apps: Discovers every SaaS application your users access (shadow IT), applies policies to control data sharing, and monitors for anomalous behaviour across cloud services.
• Entra ID P2: Risk-based Conditional Access that automatically blocks sign-ins from compromised credentials, plus Privileged Identity Management (PIM) that enforces just-in-time admin access — your Global Admins only get elevated permissions when they need them, with automatic expiry.

Compliance, Governance, and eDiscovery

For organisations in regulated industries — BFSI, healthcare, government, legal — the compliance features in E5 can be the deciding factor:

Customer Lockbox deserves special mention: it requires explicit approval from your organisation before Microsoft support engineers can access your tenant data. For Indian enterprises subject to data localisation requirements or handling sensitive financial data, this is a governance control that auditors specifically look for.

Insider Risk Management detects potential data leaks, IP theft, and policy violations by analysing user behaviour patterns. With DPDPA (Digital Personal Data Protection Act) enforcement approaching, the ability to detect and investigate data exfiltration before it becomes a breach is increasingly important.

Analytics and Communication

*Office 365 E5 comes in two variants: with and without Audio Conferencing. The variant without Audio Conferencing (SKU CFQ7TTC0LF8S) is more commonly quoted in India as PSTN dial-in requirements vary. Audio Conferencing can always be added separately if needed.

Teams Phone System replaces traditional PBX infrastructure with cloud-based calling capabilities. If your organisation is still running on-premises PBX hardware, E5 gives you the phone system license — you only need to add a calling plan or Direct Routing for PSTN connectivity.

The Cost Question — Is E5 Worth the Premium?

Office 365 E5 costs approximately 65 percent more than E3 on a per-user basis. That is a significant premium. But here is how to think about it:

Calculate what you are already spending on standalone tools

Add up what you currently pay for:

• Email security gateway (Proofpoint, Mimecast, or similar)
• Endpoint detection and response (CrowdStrike, SentinelOne, or similar)
• Identity protection / PAM solution
• CASB / shadow IT discovery
• Power BI Pro licenses
• eDiscovery or compliance tools

If the combined cost of these tools exceeds the E3-to-E5 delta, E5 is the more cost-effective choice — and you get the benefit of a fully integrated security stack where all components share threat intelligence and automated response workflows.

The mixed licensing approach

Microsoft allows mixing E3 and E5 licenses within the same tenant. A common strategy for cost-conscious enterprises:

• E5 for high-risk users: IT administrators, finance, legal, CXO team, anyone with access to sensitive data or elevated privileges.
• E3 for general staff: Users who primarily need productivity tools and basic email protection.

For a 600-user organisation, putting 25 percent of users (150) on E5 and the rest on E3 reduces the total cost by roughly 30 percent compared to full E5 deployment — while still providing top-tier security and compliance where it matters most.

Our Recommendation

Choose E3 if:

• Your primary need is productivity and collaboration
• You already have a mature third-party security stack (CrowdStrike, Palo Alto, Zscaler) that you are happy with
• Your compliance requirements are straightforward (no eDiscovery Premium, no Insider Risk Management needed)
• Budget is the primary constraint and security tooling is handled separately

Choose E5 if:

• You are in a regulated industry (BFSI, healthcare, government) with strict compliance requirements
• You want to consolidate security tools into a single integrated platform
• You need advanced threat protection (EDR, email security, identity protection) and do not want to manage multiple vendor relationships
• You require Power BI Pro across your organisation
• You need eDiscovery Premium, Insider Risk Management, or Customer Lockbox for audit and governance

Choose mixed E3 + E5 if:

• You need E5 security and compliance for a subset of users but cannot justify the cost for everyone
• Your risk profile varies significantly across departments
• You want to start with E5 for high-risk users and expand later based on demonstrated value

Important Notes for Indian Buyers

1. GST: All Microsoft CSP pricing is exclusive of 18 percent GST. Factor this into your budget.
2. NCE cancellation policy: Under Microsoft's New Commerce Experience, cancellation is permitted within 7 calendar days of provisioning. After 7 days, you are committed for the full annual term with no refunds.
3. Microsoft Copilot is a paid add-on for both E3 and E5 — it is not included in either plan.
4. FastTrack deployment: For enterprise deployments (500+ users), Microsoft FastTrack provides free deployment assistance through your CSP partner.
5. Annual vs monthly billing: Annual commitment (P1Y) pricing is significantly lower than month-to-month. For 600+ users, always negotiate annual billing.

How Ogma Can Help

Ogma Consulting is an authorised Microsoft CSP partner in India. We help enterprises with:

• License optimisation: We analyse your user profiles, security requirements, and existing tooling to recommend the most cost-effective mix of E3 and E5 licenses.
• Migration and deployment: End-to-end migration from on-premises Exchange, Google Workspace, or other platforms to Office 365 / Microsoft 365.
• Security configuration: Proper deployment of Defender stack, Conditional Access policies, DLP rules, and compliance features — not just license provisioning.
• Ongoing support: Dedicated account management, license true-ups, and technical support from our Microsoft-certified team.

Need a custom quote for your organisation? Contact our Microsoft licensing team or call us at +91 80 0979 0979.

Frequently Asked Questions

Can I mix E3 and E5 licenses in the same Microsoft 365 tenant?

Yes. Microsoft fully supports mixed licensing within a single tenant. You can assign E5 to specific users (such as IT admins, finance, and legal teams) and E3 to the rest. All users share the same tenant, directory, and collaboration features.

Does Office 365 E3 include Entra ID P1 (Azure AD Premium P1)?

No. This is a common misconception. Entra ID P1 is included in Microsoft 365 E3, not Office 365 E3. If you specifically need Conditional Access or MFA policies beyond security defaults, you need either the M365 E3 upgrade or a standalone Entra ID P1 add-on.

Is Microsoft Defender for Endpoint in E5 comparable to CrowdStrike or SentinelOne?

Yes. Microsoft Defender for Endpoint is consistently rated as a Leader in Gartner's Magic Quadrant for Endpoint Protection Platforms. It provides NGAV, EDR, vulnerability management, and automated investigation. The key advantage of the E5 bundle is that Defender for Endpoint shares threat signals with Defender for Office 365, Defender for Identity, and Defender for Cloud Apps — creating a unified XDR (Extended Detection and Response) platform.

What is the difference between Office 365 E5 with and without Audio Conferencing?

The only difference is PSTN dial-in capability for Teams meetings. The variant without Audio Conferencing (CFQ7TTC0LF8S) does not include toll-free or toll dial-in numbers for meetings. All other E5 features including Teams Phone System are identical. Audio Conferencing can be added as a separate add-on if needed later.

Is Microsoft 365 Copilot included in E5?

No. Microsoft 365 Copilot is a separate paid add-on available for both E3 and E5 users. Both plans are eligible for the Copilot add-on, but it is not bundled with either.

How does the NCE cancellation policy work for annual subscriptions?

Under Microsoft's New Commerce Experience (NCE), you have a 7-day cancellation window from the date of subscription provisioning. Within the first 24 hours, cancellation is free. Between 24 hours and 7 days, prorated charges apply. After 7 days, the subscription cannot be cancelled and charges apply for the full annual term.