10 frequent Microsoft 365 risks in SMEs

Why these risks matter

In an SME, Microsoft 365 concentrates identities, email, files, meetings, collaboration, devices and sometimes sensitive data. Risks do not only come from cyberattacks: they also appear in forgotten accounts, excessive rights, external sharing or poorly governed licences.

The 10 risks to monitor

1. Accounts without MFA. An unprotected account becomes a preferred entry point for phishing and compromise.
2. Too many administrators. High-level roles must be limited, documented and regularly reviewed.
3. Inactive accounts still enabled. Poorly managed departures or role changes leave unnecessary access open.
4. Unreviewed external guests. Partner or supplier access may remain open long after the initial need.
5. Anonymous or overly broad sharing. Open links expose sensitive documents beyond the intended scope.
6. Teams and SharePoint without owners. Without lifecycle rules, spaces accumulate and become difficult to control.
7. Unused licences. Dormant accounts or oversized plans create avoidable costs.
8. Incomplete email protection. SPF, DKIM, DMARC, anti-phishing and forwarding rules must be checked.
9. Insufficient logging and evidence. Without usable logs, incident analysis and compliance become fragile.
10. Poorly documented backup and recovery. Microsoft 365 does not replace a tested continuity and recovery strategy.

How to reduce exposure

The right approach combines inventory, prioritisation and an action plan. An SME does not need to fix everything at once: it should start with identities, administrators, guests, sharing and licences.

What ITSelect recommends

ITSelect recommends an executive-oriented Microsoft 365 review: maturity score, priority risks, potential savings, responsibilities, quick wins and a 30/60/90-day roadmap.