Does Microsoft 365 have built-in antivirus?

Chris Moroz

Published on: 23/07/2026

Microsoft 365 includes built-in security, but protection varies by plan. Learn how antivirus, Defender, email security, cloud protection, and endpoint tools work together for small businesses.

Microsoft 365 antivirusMicrosoft Defender for Business

Does Microsoft 365 have built-in antivirus?

Chris Moroz

Published on: 25/12/2025

Microsoft 365 includes built-in antivirus and Defender tools, but small businesses need the right licenses, settings, endpoint protection, and ongoing security management to stay fully protected.

Microsoft Defender for businessMicrosoft 365 antivirus