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M365 Admin
Microsoft Defender for Office 365: Update of blocked transport rule count volume in Mailflow status report
We are updating the aggregate count volume of blocked transport rule emails in Mailflow status report.
When this will happen:
Standard: starting mid-December 2023
Government: starting late December 2023
How this will affect your organization:
Previously, the aggregate count of Transport rule email blocked that was shown in the Mail flow status report included the count of all filtered email that matched a transport (not necessarily blocked by the transport rule it matched)
We are updating this behavior to ensure that aggregate count of Transport rule emails blocked actually represent the total volume of emails that match a transport rule and was blocked by that transport rule.
What you need to do to prepare:
The purpose of this communication is for awareness. Admins should also update their training documentation as they see fit.
As a result of this change, Admins will notice a reduction in the volume of emails that are blocked by transport rules which is shown in the Mail flow status report. This reduction is expected.
Message ID: MC698146
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