Keeping Microsoft 365 software up to date with regular patches is an important step in protecting your business data, but it is not enough on its own to ensure full security. Patching fixes known software vulnerabilities, which helps prevent cybercriminals from exploiting weaknesses. However, Microsoft 365 is just one part of your overall IT environment, and threats can come from many angles beyond unpatched software.
For UK SMEs, the consequences of relying solely on patching can be significant. A cyberattack or data breach can cause costly downtime, disrupt staff productivity, and damage customer trust. There are also compliance considerations under UK GDPR and the Data Protection Act 2018, which require reasonable steps to protect personal data. Simply applying Microsoft 365 patches does not cover areas such as user access control, email phishing protection, or secure device management, all of which are critical to reducing risk.
Typical business scenario
Imagine a 50-employee accounting firm using Microsoft 365 for email, document storage, and collaboration. They keep their software patched but have weak password policies and no multi-factor authentication (MFA). A staff member falls victim to a phishing email that bypasses basic spam filters. The attacker gains access to sensitive client files and holds them to ransom. Despite patched software, the business suffers data loss, reputational harm, and costly incident response. A trusted IT partner would help by implementing MFA, regular security awareness training, and continuous monitoring alongside patch management to build a layered defence.
Practical checklist for UK SMEs
- Ask your IT provider: How do you manage Microsoft 365 patching and security updates? Do you also implement MFA and monitor for suspicious activity?
- Review your access controls: Are user permissions regularly reviewed and limited to what is necessary? Are strong password policies enforced?
- Check backup processes: Are Microsoft 365 data backups performed regularly and tested for restoration?
- Assess email security: Is advanced phishing protection enabled, such as Microsoft Defender for Office 365 or similar?
- Verify device management: Are devices accessing Microsoft 365 secured with encryption, antivirus, and up-to-date software?
- Consider compliance readiness: Do you maintain audit logs and documentation to demonstrate security controls for UK GDPR and ICO guidance?
Next steps
While patching Microsoft 365 is essential, it should be part of a broader, layered cybersecurity approach tailored to your business needs. Speaking with a trusted managed IT provider or IT advisor can help you understand your current security posture, address gaps, and implement practical controls that protect your data and support compliance. Taking these steps calmly and methodically will reduce risk and help keep your business running smoothly.