Microsoft 365 Security

Microsoft 365 Security Checklist for Swiss SMEs

Dexino Insights · Microsoft 365 · Security · Swiss SMEs

Microsoft 365 is often the centre of daily work for small and medium-sized businesses: email, Teams, SharePoint, OneDrive, calendars and documents. That also makes it one of the most important areas to secure properly.

1. Protect every account with MFA

Multi-factor authentication should be enabled for all users, especially administrators. For smaller organisations, this is one of the highest-impact improvements because many attacks begin with stolen passwords.

2. Separate administrator accounts

Daily work accounts should not also be global administrator accounts. Use separate admin accounts, keep the number of privileged users low, and review permissions regularly.

3. Review mail security

Phishing remains a common entry point. Review anti-phishing protection, external sender warnings, safe links, attachment handling and mailbox forwarding rules.

4. Secure Teams, SharePoint and OneDrive

Many businesses unintentionally expose files through oversharing. Review guest access, anonymous links, sharing permissions and ownership of important sites.

5. Create a recovery plan

Microsoft 365 availability is not the same as business backup. Define what needs to be restored, who is responsible, and how quickly important data must be recovered.

6. Document the environment

A simple overview of users, groups, admin roles, domains, licenses and critical services helps enormously during support, audits and incident response.

Practical next step

Start with MFA, administrator roles and mail security. These areas usually create the fastest risk reduction for Swiss SMEs.