Multi-factor authentication
MFA coverage and registration are reviewed so passwords are not the only protection for supported accounts.
Microsoft 365 security
Microsoft 365 Security and Tenant Configuration
Improve the core security configuration around Microsoft 365 accounts, administrator access, email authentication and supported identity controls, using measures appropriate to the organisation’s licences and risk.
Practical tenant hardening
Reduce avoidable weaknesses in accounts and email configuration.
This service focuses on foundational Microsoft 365 configuration. It is not penetration testing, a managed SOC or 24/7 security monitoring.
Administrator accounts
Administrative access is separated and protected according to a practical least-privilege approach.
Security Defaults
Microsoft Security Defaults can be reviewed for suitable tenants, with limitations explained before changes.
Conditional Access
Where licensing and requirements justify it, scoped Conditional Access policies can be planned and piloted.
SPF, DKIM and DMARC
Legitimate sending services are identified and email-authentication records configured in a controlled sequence.
Entra ID and Defender features
Relevant identity and Microsoft Defender capabilities are reviewed only where customer licensing supports them.
Common scenarios
When Microsoft 365 needs a focused configuration review.
Tenants often evolve through urgent additions, supplier changes and one-off fixes. That can leave inconsistent MFA, too many administrators, outdated DNS records or settings nobody is sure should still exist.
A focused project documents the current position, agrees priority changes and pilots controls that could affect sign-in. It does not replace ongoing security ownership, user awareness or incident response.
Projects often start with
- MFA is incomplete or inconsistently enforced
- Administrator roles have accumulated over time
- The business domain lacks clear SPF, DKIM or DMARC configuration
- A migration needs security settings prepared before cutover
- Licensing has changed and relevant controls need reviewing
Our process
A defined route from assessment to handover.
Exact tasks vary by service, but the project remains structured and visible.
- 01
Assess
Understand the current environment, users, data and constraints.
- 02
Plan
Agree the target setup, responsibilities, sequence and scope.
- 03
Prepare
Create and configure the destination before moving production data.
- 04
Deliver
Apply the approved tenant, identity and mail-authentication changes in a controlled sequence.
- 05
Verify
Test representative sign-ins, administrator access, mail authentication and the intended policy outcomes.
- 06
Handover
Provide clear documentation and explain the completed setup.
Scope and delivery
What is included.
A Microsoft 365 security configuration project can include:
- Tenant and licence review
- MFA coverage and registration planning
- Administrator role review
- Secure administrator account approach
- Security Defaults or Conditional Access assessment
- SPF, DKIM and DMARC review
- Relevant Defender feature review
- Change record and handover notes
Security and disruption
Practical risks are discussed before changes begin.
Identity controls can lock out users if deployed without exclusions, pilot accounts and emergency access planning. Changes that affect authentication are staged and tested.
SPF, DKIM and DMARC depend on every legitimate sender using the business domain. A restrictive policy should not be published until sources are understood and authentication results support it.
Why Next Layer IT
Technical project work without an unnecessary support contract.
Our engineers carry out the agreed technical work, explain decisions in plain English and document the handover. We keep the focus on the project rather than using it as a route into services you did not ask for.
- Scope agreed before production changes
- Straightforward pricing and responsibilities
- Security considered as part of delivery
- Verification and documented handover
Frequently asked questions
Microsoft 365 security questions
Clear answers to common questions about scope, timing and delivery.
Tell us about your projectIs MFA enough to secure Microsoft 365?
MFA is an important control but not the whole security model. Administrator protection, user lifecycle, devices, mail authentication, application consent and recovery arrangements also matter.
Should we use Security Defaults or Conditional Access?
Security Defaults can provide a useful baseline for suitable tenants. Conditional Access offers more control but requires appropriate licensing and careful policy design. The choice depends on your environment.
Can you configure DMARC?
Yes, as part of a scoped domain-email review. Legitimate senders and existing SPF and DKIM results should be understood before moving to a restrictive DMARC policy.
Do you provide penetration testing or 24/7 monitoring?
No. This service covers practical Microsoft 365 configuration projects. It does not claim penetration testing, SOC services, continuous monitoring or incident response.
Will every Microsoft security feature be available?
No. Capabilities depend on licensing and tenant configuration. We identify what is available and avoid promising features outside the customer’s subscription.
Discuss your project
Improve the Microsoft 365 controls that matter first.
Tell us the tenant size, licences, current MFA position and the security concern or change that prompted the review.