Microsoft Defender for Office 365: Exchange Online Protection- Customizable Authenticated Received Chain (ARC) configuration

Originally posted by Microsoft Oct 15, 2021 Microsoft Defender for Office 365 0 Comments

Email senders use authentication mechanisms like SPF, DKIM, DMARC to authenticate emails, but some legitimate intermediate services may potentially make changes to the email, which might cause the email to fail authentication at subsequent hop. Authenticated Received Chain (ARC) is an authentication mechanism that helps preserve authentication results across intermediaries. With this change, admins will be able to add trusted intermediaries in the Microsoft 365 Defender portal to allow Microsoft to honor these ARC signatures, thereby allowing legitimate messages.
More info: https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/use-dmarc-to-validate-email?view=o365-worldwide#how-microsoft-365-utilizes-authenticated-received-chain-arc

Product	Microsoft Defender for Office 365
Release phase	General Availability
Release date	March CY2022
Platform	Web
Cloud Instance	Worldwide (Standard Multi-Tenant)
Created	2021-10-15
Roadmap ID	85684
Roadmap Link	https://www.microsoft.com/microsoft-365/roadmap?featureid=85684