Microsoft 365 Security
Close the Microsoft 365 gaps that attackers actually exploit.
Most UK business breaches start with a compromised Microsoft 365 account. The fix is rarely a new product — it’s closing the configuration gaps that ship with every tenant. iTVerse hardens your M365 environment properly, in alignment with Cyber Essentials and the NCSC baseline.
In brief
- MFA, Conditional Access and Intune configured properly
- Microsoft Defender deployed with real-world policies
- DKIM, DMARC and email authentication hardened
- Cyber Essentials aligned from day one
- Secure Score uplift typically 20+ points in the first month
The problem
The Microsoft 365 security gaps we find most often
Most tenants we review have the same five gaps. None are exotic. All are fixable within 2–3 weeks.
MFA not fully enforced
Legacy authentication methods (IMAP, POP3, basic auth) still enabled, creating easy account takeover routes regardless of MFA being “on”.
No Conditional Access policies
Every user can sign in from anywhere, on any device, at any time. No sign-in risk controls, no device compliance gates, no legacy auth blocks.
Overprivileged accounts
Five or six global admins is normal. So is individual users having admin-like roles they don’t need. Principle of least privilege is ignored.
Intune not deployed
Devices joined to Azure AD but not enrolled in Intune. No compliance policies, no enforced encryption, no centralised control when a device is lost.
Email authentication missing
SPF exists but is soft-fail. DKIM isn’t configured. DMARC is missing entirely. Your domain can be spoofed by anyone with an email client.
Defender policies at defaults
Safe Links, Safe Attachments and anti-phishing policies still at Microsoft defaults, which are deliberately permissive to avoid disrupting new tenants.
Before you book a review
Use these free tools to see where you stand
Built by our M365 specialists. No sign-up, no email required. Outputs in under 3 minutes.
Security Cost Calculator
Answer 6 questions about your users, devices and current Microsoft Secure Score. Get an indicative cost range to bring your tenant up to the standard UK businesses need.
Start the calculator →
Tenant Health Scan
15 weighted questions covering identity, devices, data protection and email security. Get a scored result and a prioritised list of what to fix first.
Start the health scan →
How we work
A typical Microsoft 365 security engagement
Week 1
Assessment
Tenant scan, Secure Score review, Conditional Access audit, Intune compliance check, mail flow and email authentication review. Gap analysis documented.
Week 2
Priority plan
Written report with prioritised remediation plan. Quick wins (MFA enforcement, legacy auth block) delivered in parallel. Clear costs and timelines for the larger pieces.
Week 3+
Rollout
Conditional Access baseline, Intune device compliance, Defender policy hardening, DKIM/DMARC deployment. Each change staged, tested and communicated.
Proof
Microsoft 365 security in action
850-person construction firm
Cyber Essentials, Azure AD, Conditional Access and Defender rolled out across a large estate.
Bradford conveyancing firm
Cybersecurity transformation — security appliance, endpoint protection, cloud backup.
Leeds manufacturer
Cloud migration with Cyber Essentials and full M365 security baseline built in from day one.
FAQ
Microsoft 365 security questions
Ready to secure your tenant?
Book a free Microsoft 365 security review
Start with the free health scan to get a picture of where you stand. Then book a call with iTVerse for a detailed review of your tenant and a prioritised plan to close the gaps.