Microsoft 365 security review and hardening for businesses in Singapore and APAC
Microsoft 365 is not secure by default. Tenants are routinely left with multi-factor authentication unenforced, legacy authentication open, files over-shared, no data-loss controls and a Secure Score nobody has looked at. PTS reviews your existing environment, hardens it against real-world attacks, and hands you a prioritised roadmap you can actually act on.
Whether you inherited a tenant someone else built, need to satisfy a client security questionnaire or cyber-insurance requirement, or simply want peace of mind, we give you an honest picture of where you stand and what to fix first — anchored to recognised standards, not opinion.
For the wider picture see our cybersecurity services; setting up a brand-new tenant instead? See Microsoft 365 setup.
Why a Microsoft 365 security review matters
Out of the box, Microsoft 365 prioritises getting you working over keeping you safe. The gaps we most often find:
- Identity — MFA not enforced for everyone, no conditional access, standing global-admin rights, legacy authentication still enabled.
- Email — weak anti-phishing and anti-spoofing, missing DMARC enforcement, risky auto-forwarding rules.
- Data — files and SharePoint sites shared too widely, no data-loss prevention, sensitive information unlabelled.
- Recoverability — reliance on Microsoft’s native retention with no independent backup.
The PTS Microsoft 365 Security Review
Our Security Review assesses your tenant against a practical, standards-aligned benchmark and turns the findings into clear, prioritised actions.
1. Baseline & Secure Score
We capture your current Microsoft Secure Score and configuration as a baseline, so improvement is measurable and you can prove progress to clients and insurers.
2. Identity & access
We review MFA, conditional access, admin roles and legacy authentication, closing the gaps attackers exploit most and applying least-privilege access.
3. Email & anti-phishing
We harden Exchange Online and Microsoft Defender — anti-phishing, anti-spoofing, safe links and attachments, DMARC — to cut the most common breach entry point.
4. Data protection
We assess sharing, apply Microsoft Purview, sensitivity labels and data-loss prevention where needed, and rein in over-exposed files and SharePoint sites.
5. Devices & endpoints
We check device compliance and endpoint protection so only healthy, managed devices reach your data, integrating with your wider cybersecurity controls.
6. Backup & recoverability
We confirm you have independent, tested backup of Microsoft 365 data, so accidental deletion, ransomware or a tenant-level problem is survivable.
7. Remediation roadmap
You receive a prioritised roadmap — risk-rated findings, owners and timelines — and we can carry out the remediation or work alongside your team.
Not sure how secure your Microsoft 365 really is?
Practical, costed proposal · No obligation
Standards we align to
PTS is ISO/IEC 27001 certified (information security) and aligned to ISO/IEC 20000 (service management), so our review reflects how we run security internally. We also map findings to the obligations that matter in Singapore — the Personal Data Protection Act (PDPA) and MAS (Monetary Authority of Singapore) technology risk guidelines — so security and compliance pull in the same direction. For clients with Mainland China operations, we can also map to China PIPL obligations.
What you receive
A clear report with risk-rated findings, your current and target Secure Score, and a prioritised remediation roadmap with owners and timelines — written for business owners, not just technical teams. From there we can fix the issues, hand them to your team, or fold ongoing protection into managed IT services.
Microsoft 365 security FAQs
Isn’t Microsoft 365 already secure by default?
No. Microsoft secures its platform, but securing your tenant — MFA, conditional access, admin roles, email hardening, data protection and backup — is your responsibility, and the defaults leave significant gaps.
What is a Microsoft Secure Score?
Secure Score is Microsoft’s measure of your tenant’s security posture. We use it as a baseline and target so improvement is measurable, and you can evidence progress to clients and cyber-insurers.
What does the security review cover?
Identity and access, email and anti-phishing, data protection and sharing, device and endpoint health, and backup and recoverability — benchmarked, then turned into a prioritised remediation roadmap.
Will the review disrupt our users?
No. The assessment itself is non-disruptive. Any hardening changes are planned and communicated, and we sequence them to avoid surprises — for example, rolling out MFA and conditional access carefully.
Do you fix the issues or just report them?
Either. You get a clear report and roadmap regardless; from there we can carry out the remediation, work alongside your in-house team, or provide ongoing managed protection.
How does this relate to ISO 27001, PDPA and MAS requirements?
We are ISO 27001 certified and align findings to the controls those standards expect, and to Singapore PDPA and MAS technology risk obligations, so your Microsoft 365 supports compliance rather than undermining it.
How do we get started?
Most engagements begin with the security review so we understand your current state. We then agree a prioritised plan covering identity, email, data, devices and backup that fits your budget and risk.