Microsoft 365 E5 is Microsoft’s most comprehensive enterprise plan, adding the industry’s most advanced security, compliance, and analytics capabilities on top of Microsoft 365 E3. It is the plan of choice for organisations that face sophisticated cyber threats, strict regulatory requirements, or that need enterprise analytics built in.
What’s Included
- Everything in Microsoft 365 E3 — Full Office apps, 100 GB mailbox, Windows Enterprise rights, Intune, Azure AD P1, and compliance tools.
- Microsoft Defender for Endpoint P2 — Advanced endpoint detection & response (EDR), automated investigation & remediation, threat intelligence, Microsoft Threat Experts, and attack surface reduction. The most complete endpoint security platform.
- Microsoft Defender for Identity — Detects identity-based attacks on Active Directory: lateral movement, credential theft, pass-the-hash, and golden ticket attacks. Uses behavioural analytics and threat intelligence.
- Microsoft Defender for Office 365 Plan 2 — Safe Links, Safe Attachments, anti-phishing, Attack Simulator for security training, and Threat Investigation & Response automation.
- Microsoft Defender for Cloud Apps — Cloud access security broker (CASB). Discover shadow IT, control data in cloud apps, and detect anomalous user behaviour across 16,000+ cloud applications.
- Azure AD Premium P2 (Microsoft Entra ID P2) — Identity Protection (risk-based Conditional Access that responds to real-time sign-in risk), Privileged Identity Management (just-in-time admin access), and access reviews.
- Microsoft Purview Compliance (E5) — Advanced eDiscovery with machine learning-based review sets, Insider Risk Management, Communication Compliance, Information Barriers, and Customer Lockbox.
- Power BI Pro — Interactive dashboards and reports, 100+ data connectors, workspace collaboration, and report sharing — included for every E5 user.
- Audio Conferencing — Dial-in phone numbers for Teams meetings in 90+ countries, so attendees without internet can still join.
- Microsoft Viva Insights — Personal and team productivity analytics and wellbeing recommendations.
Storage & Limits
- Exchange mailbox: 100 GB per user + unlimited archive
- OneDrive: 1 TB per user
- Office installs: 5 PCs/Macs + 5 phones + 5 tablets per user
- No maximum user limit
Ideal For
Large enterprises and organisations facing advanced persistent threats, those in highly regulated industries (financial services, government, healthcare), and companies that want a single licence covering security, compliance, and analytics without managing multiple separate products.
Keys Locker CSP Guarantee
- Genuine Microsoft CSP licence — provisioned directly through the official Microsoft partner channel
- 99.9% uptime SLA — Microsoft-backed service level agreement for all Microsoft 365 services
- Instant provisioning — subscription activated within minutes of payment confirming
- 7-day money-back guarantee — full refund if not provisioned or unused within 7 days
- Flexible cancellation — cancel monthly plans anytime; annual plans cancel at end of term
- 24/7 partner support — our team escalates issues directly to Microsoft on your behalf
- Scale up or down anytime — add or remove seats mid-cycle with no penalty




