Microsoft Defender for Office 365 is updating to support IPv6 in Tenant Allow/Block List, with a revised rollout timeline starting early October 2024. This update applies to customers with specific service plans and will allow admins to block or allow IPv6 addresses without submissions. Rollout requires no admin action prior to the update.
Applies to: Exchange Online · Microsoft Defender XDR
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).