MC467231 – Exchange Online Protection: Bulk Filter (BCL) Improvements

Microsoft Exchange Logo

check before: 2022-11-29

Product:

Defender, Exchange, Microsoft 365 Defender

Platform:

Online, World tenant

Status:

Change type:

Feature update, Admin impact

Links:

Details:

Exchange Online Protection (EOP) assigns a bulk complaint level (BCL) to inbound messages from bulk mailers. A higher BCL indicates a bulk message is less likely to be wanted by the user.

We are rolling out several changes in how we allocate BCL scores to messages to provide more accurate scoring and coverage for bulk messages. We are also updating the threshold for the strict policy from 4 to 5 to better align with the new scoring. In addition, customers using Microsoft Defender for Office P2 or customers with E5 licenses will be able to view the BCL score for a message in advanced hunting.
[When this will happen:]
We will begin rolling out in mid-November and expect to complete rollout by late January 2023.

Change Category:
XXXXXXX ...

Scope:
XXXXXXX ...

Release Phase:

Created:
2022-11-15

updated:
2022-11-15

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