A Practical Microsoft 365 Security Baseline for Growing Businesses

A business-focused baseline for identities, administrator roles, sharing, devices, email, logging, recovery, and ongoing ownership.

Protect identity first

Review multifactor authentication, legacy authentication, conditional access where licensed and appropriate, guest accounts, service accounts, and sign-in risk. Start with administrators and sensitive roles.

Reduce standing privilege

Use separate administrative accounts, least privilege, documented role assignment, emergency access procedures, and regular review. Avoid sharing administrator credentials.

Govern sharing and devices

Define external-sharing expectations, device requirements, application consent, retention needs, and ownership for Teams and SharePoint workspaces. Match controls to business use.

Create an operating rhythm

Review alerts, configuration changes, inactive users, license assignments, recovery methods, and exceptions on a schedule. Features vary by license and configuration, so validate the plan against the actual tenant.

Microsoft 365 security baseline checklist

• Inventory administrator roles
• Review MFA and legacy sign-in paths
• Set external-sharing expectations
• Document joiner/mover/leaver steps
• Schedule recurring configuration review

How AMD Technology helps secure Microsoft 365

AMD Technology can help clarify requirements, evaluate options, coordinate providers and projects, and support an appropriate next step. Recommendations should reflect the organization’s actual environment, priorities, budget, contracts, and risk profile.