check before: 2024-10-15
Product:
Defender, Defender for Office 365, Defender XDR, Exchange
Platform:
Online, US Instances, World tenant
Status:
Change type:
Feature update, User impact, Admin impact
Links:
Details:
Summary:
Microsoft Exchange is enhancing bulk email filtering with recalibrated bulk sender distribution across different bulk complaint levels (BCL). New BCL recommendations are 7 for default and standard, and 5 for strict policies. Rollout starts mid-October 2024, with completion by mid-November 2024. Admins should adjust BCL settings accordingly.
Details:
As part of ongoing improvements to bulk email filtering in Microsoft Defender for Office | Exchange Online Protection, we are refining our detection capabilities by recalibrating and redistributing bulk senders across different bulk complaint levels (BCL). This would automatically make the current bulk thresholds slightly more aggressive. As a consequence, we are updating bulk threshold for standard preset policy to 7 from current value of 6. In response to general customer feedback around receiving more bulk email, we are keeping current default BCL threshold of 7 in default policy as is. Here's what's changing:
Redistribution for aggressive filtering: The new BCL distribution makes higher levels as aggressive as lower levels in previous version, enabling more precise targeting of unwanted bulk emails.
Updated BCL recommendations: The new recommended settings are 7 for default and standard, and 5 for strict to improve control over bulk filtering (replacing the previous levels of 7, 6, and 5).
[When this will happen:]
General Availability (Worldwide, GCC, GCC High, DoD): We will begin rolling out mid-October 2024 and expect to complete by mid-November 2024.
Change Category:
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Scope:
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Release Phase:
Created:
2024-10-19
updated:
2024-10-19
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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summary for non-techies**
Microsoft Exchange is updating its Bulk Complaint Levels (BCL) to more precisely filter bulk emails, with the default setting now recommended at 7 and stricter settings at 5, rolling out from mid-October to mid-November 2024.
Direct effects for Operations**
Increased False Positives in Email Filtering
The recalibrated bulk complaint levels may lead to an increase in legitimate emails being marked as bulk or spam, affecting user communication.
- roles: End Users, IT Support
- references: https://learn.microsoft.com/defender-office-365/anti-spam-bulk-complaint-level-bcl-about, https://learn.microsoft.com/defender-office-365/anti-spam-bulk-senders-insight
User Experience Degradation
Users may experience delays in receiving important emails due to aggressive filtering, leading to frustration and decreased productivity.
- roles: End Users, Email Administrators
- references: https://learn.microsoft.com/defender-office-365/anti-spam-bulk-complaint-level-bcl-about, https://learn.microsoft.com/defender-office-365/anti-spam-bulk-senders-insight
Increased Administrative Workload
Admins will need to spend additional time adjusting BCL settings and monitoring email flows to mitigate the impact of false positives.
- roles: IT Administrators, Compliance Officers
- references: https://learn.microsoft.com/defender-office-365/anti-spam-bulk-complaint-level-bcl-about, https://learn.microsoft.com/defender-office-365/anti-spam-bulk-senders-insight
Configutation Options**
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Opportunities**
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Potentional Risks**
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IT Security**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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Last updated 11 months ago ago
