Microsoft 365 Beyond Collaboration: The Security Stack You Already Pay For

Ask an IT leader what their Microsoft 365 subscription does and the answer is usually email, Teams, SharePoint, and the Office apps. Then look at the invoices. In one organization of roughly 6,000 users we worked with, the third-party email filter and endpoint protection product they were paying for separately covered most of what an upgrade to Microsoft 365 E5 would cost, because E5 already included both.

Microsoft 365 is an identity, endpoint management, security, and compliance platform that happens to ship with collaboration tools. Microsoft 365 E3 and E5 include Microsoft Entra ID, Microsoft Intune, the Microsoft Defender products, and Microsoft Purview, and most tenants have turned on a fraction of them. In most organizations, the fastest security budget win is configuring the platform already licensed.

Why Organizations Pay Twice for Microsoft 365 Security

Organizations pay twice because the security tools were bought before anyone mapped them against the Microsoft 365 license. A team signs up for a third-party multifactor authentication product, an email gateway, and an endpoint detection and response (EDR) agent, then moves to E5 for Copilot or compliance reasons and never revisits the earlier contracts. Each renewal goes through without review, and the overlap compounds every year.

Mapping the overlap starts with knowing exactly which features each plan carries. M365 Maps is the reference we use most for this. It is an independently maintained set of licensing diagrams and a searchable feature matrix that compares Microsoft 365 plans side by side, and it is updated several times a year as Microsoft repackages the suites.

Some third-party tools still earn their place, and we call those out below. The goal is to make every overlap a deliberate decision rather than leaving it to procurement history. With that framing in place, the next question is what each license tier actually contains.

What Microsoft 365 E3, E5, and E7 Include Beyond Collaboration

Microsoft 365 E3 includes Microsoft Entra ID P1 and a substantial set of Intune capabilities, E5 adds Entra ID P2 and the broader Defender and Purview suites, and E7 adds the Microsoft Entra Suite on top of E5. Microsoft’s Entra licensing documentation lists P1 in E3, E5, and E7, P2 in E5 and E7, and the Entra Suite, which bundles Private Access, Internet Access, ID Governance, ID Protection, and Verified ID, in E7.

Intune changed the most this year. According to Microsoft’s Intune planning guide, starting in July 2026 the former Intune Suite capabilities are distributed across the Microsoft 365 tiers:

Many organizations still pay for a standalone remote support tool or a certificate authority they no longer need, because the license change rolled out automatically and quietly. Those capabilities are worth checking first. The identity layer is where most of the remaining overlap lives.

Which Microsoft Entra ID Features Replace Standalone Identity Tools

Microsoft Entra ID replaces most standalone single sign-on, multifactor authentication, and privileged access products for organizations already on E3 or E5. Consolidating every application’s sign-in into Entra ID, and retiring other identity providers such as Active Directory Federation Services, puts every sign-in log in one place, which matters the first time you have to investigate a compromised account across several apps.

Multifactor authentication through Microsoft Authenticator covers the same ground as most third-party MFA products. The honest exception is desktop device trust: some third-party products still offer device posture checks and network-based bypass rules at the workstation sign-in that Microsoft has not fully matched. Conditional Access then decides who signs in, from where, on which device, and at what risk level, and self-service password reset takes a steady stream of tickets off the help desk. We cover the settings worth reviewing in Microsoft Entra ID settings every admin should review.

Two capabilities deserve more attention than they get:

• Privileged Identity Management (PIM) makes administrators standard users by default and grants admin roles just in time, for a limited period, with an audit trail and notifications on every activation. PIM requires Microsoft Entra ID P2, which E5 includes.
• Global Secure Access tunnels user traffic through Microsoft’s network with three traffic forwarding profiles: Microsoft traffic, Private Access for internal resources, and Internet Access for web filtering and TLS inspection. Compared with an always-on VPN back to an on-premises firewall, it takes that traffic off on-premises hardware, and HTTPS filtering works without pushing certificates to every device by hand. Expect more CAPTCHA prompts on some websites, since traffic now leaves from Microsoft’s egress addresses.

Identity decides who gets in. The device they sign in from is Intune’s job.

What Microsoft Intune Covers Beyond Device Enrollment

Microsoft Intune manages Windows, macOS, iOS, Android, and Linux devices, corporate and personal, and covers application deployment, patching, configuration, and data protection along with enrollment. The capability that surprises leadership most is app inventory. The discovered apps view lists every installed application and version on every managed device, and one inventory we ran surfaced roughly 90,000 installed apps across an organization, including ten versions of the same product.

Getting that number down is where the app tooling comes in. Microsoft Store apps deploy in a few clicks, and Enterprise App Management adds a catalog of prepackaged Win32 applications with install commands, detection rules, and requirements already filled in. Third-party packaging tools still add a broader catalog for organizations with a long tail of line-of-business apps.

Patching is the other half. Windows Autopatch is included with E3 and above, manages Windows, Microsoft 365 Apps, Edge, and Teams updates, and handles driver and firmware updates through approval policies. As the window between a vulnerability’s disclosure and its exploitation keeps shrinking, update rings that move in days instead of weeks matter more than they ever have.

The rest of Intune finishes the device story:

• Configuration policies replace Group Policy, and ADMX templates can be imported for settings that have no native equivalent. Our guide to migrating Group Policy to Intune walks through the approach.
• Windows Autopilot ships a device from the manufacturer straight to the employee with no imaging, and a remote wipe or fresh start returns it to a clean state from the Intune admin center.
• App protection policies secure company data on personal phones: they block copy and paste into unapproved apps, require a PIN for Outlook, encrypt organizational data, and selectively wipe it without touching the employee’s personal content.

A managed device is a protected device only when something is watching it. That is the Defender suite.

What the Microsoft Defender Suite Adds Across Email, Endpoints, and Cloud Apps

The Microsoft Defender suite covers email, endpoints, identity, and SaaS applications from one portal, which is why it overlaps with so many third-party contracts. Microsoft Defender for Office 365 scans links and attachments before they reach a user and lets an admin find and remove a malicious message from every mailbox at once through Threat Explorer. E5 also includes an attack simulator for phishing training, although dedicated security awareness vendors still produce stronger training content.

Microsoft Defender for Endpoint provides EDR and vulnerability management on every onboarded device, surfacing unpatched applications and known exploits. Microsoft’s advantage here is structural: it owns the operating system being attacked, so threat intelligence reaches the protection stack quickly. Microsoft Defender for Identity covers on-premises Active Directory as well as Entra ID, so connecting on-premises domain controllers gives one set of signals for both.

Microsoft Defender for Cloud Apps is the one most organizations underuse. Microsoft documents that the cloud app catalog includes more than a thousand generative AI apps, and marking one as unsanctioned blocks it automatically on devices onboarded to Defender for Endpoint. E3 gives visibility into which apps employees use; E5 adds the ability to block and control them. The most common findings are personal file sharing services and AI tools nobody approved. For the settings we check first, see Microsoft Defender settings worth reviewing.

Defender stops threats. Purview protects the data those threats are after.

Where to Start With Microsoft Purview Data Protection

Microsoft Purview data protection starts with sensitivity labels, before DLP, retention, or anything else. A label is the classification every later control keys off, and labels deliver value even before any encryption or blocking is attached to them. Microsoft’s guidance on getting started with sensitivity labels suggests names such as Public, General, Confidential, and Highly Confidential, and a four-label structure along those lines is where we start most organizations.

Once labels exist, data loss prevention (DLP) can act on them. Microsoft lists the locations where a sensitivity label works as a DLP condition, including Exchange email, SharePoint, OneDrive, devices, and Microsoft 365 Copilot. That last one keeps labeled content out of Copilot prompts and responses, and device DLP stops a labeled file from being copied to a USB drive.

Three more Purview capabilities round out the picture:

• Retention policies enforce both a minimum and a maximum, such as seven years for financial records, with a disposition review that removes content at expiry so the organization is not holding data it is legally better off without.
• Insider Risk Management and Communication Compliance flag risky behavior and language, such as promises of guaranteed returns in a financial services firm’s email.
• The audit log records hundreds of activity types, from file moves and sharing changes to team deletions, and is as useful for everyday troubleshooting as it is for security investigations.

Everything so far is in E3 or E5. The remaining question is whether E7 belongs on the roadmap.

Whether Microsoft 365 E7 and Agent 365 Are Worth It

Microsoft 365 E7 adds Microsoft Agent 365 and the Microsoft Entra Suite to E5 plus Microsoft 365 Copilot, and whether it pays off depends on how many people interact with agents. Agent 365 is an administrative control plane, but Microsoft’s position is that any user who benefits from a governed agent needs the license, and per-user agent reporting only appears for licensed users. In practice it is hard to track precisely who touches an agent, so most organizations that adopt E7 end up licensing everyone.

That makes E7 a renewal negotiation more than a feature decision. Price it against E5 plus the Copilot add-on at your next enterprise agreement renewal, when Microsoft has the most incentive to move you up a tier. We cover the details in Microsoft 365 E7: what’s inside the Frontier Suite and whether it’s worth it.

Key Takeaways

• As of July 2026, Microsoft 365 E3 includes Intune Plan 2, Remote Help, and Advanced Analytics, and E5 adds Endpoint Privilege Management, Cloud PKI, and Enterprise App Management.
• Privileged Identity Management needs Entra ID P2, which E5 includes; it is one of the highest-value capabilities most E5 tenants leave off.
• Marking a generative AI app unsanctioned in Defender for Cloud Apps blocks it on every device onboarded to Defender for Endpoint.
• Start Purview with sensitivity labels; DLP, Copilot protection, and device controls all key off them.

Conclusion

The license you already pay for almost certainly covers more of your security stack than your current contracts assume. Pull your third-party security renewals for the next twelve months, lay them against your Microsoft 365 plan in a feature matrix, and decide each overlap on purpose. Intelligink runs this as a fixed-scope license and configuration review through our project services, turning the overlap list into a sequenced rollout plan, so if you want a second set of eyes on it, reach out and let’s talk.