diff --git a/windows/security/threat-protection/TOC.md b/windows/security/threat-protection/TOC.md
index f42d965bea..5ef7b77e8b 100644
--- a/windows/security/threat-protection/TOC.md
+++ b/windows/security/threat-protection/TOC.md
@@ -46,6 +46,7 @@
 
 ### [Next-generation protection](windows-defender-antivirus/windows-defender-antivirus-in-windows-10.md)
 #### [Better together: Windows Defender Antivirus and Microsoft Defender ATP](windows-defender-antivirus/why-use-microsoft-antivirus.md)
+#### [Office 365 together with Windows Defender Antivirus](windows-defender-antivirus/office-365-windows-defender-antivirus.md)
 
 ### [Endpoint detection and response]()
 #### [Endpoint detection and response overview](microsoft-defender-atp/overview-endpoint-detection-response.md)