Users may experience various issues when using the Microsoft Defender and Exchange Online Protection services

Title: Users may experience various issues when using the Microsoft Defender and Exchange Online Protection services
User impact: Users may experience various issues when using the Microsoft Defender and Exchange Online Protection services.
More info: Impact includes, but is not limited to:
– Delayed quarantined email notifications
– Delayed or erroring policy change propagation
– Delayed detection, message tracing, and reporting
– Delayed Advanced hunting reports
Current status: The deployment of the code reversion is approximately 87 percent complete and we anticipate the process to be complete by our next communications update.
Scope of impact: Any user hosted out of the affected infrastructure may experience impact when attempting to perform any of the functionalities outlined in the More info section of this communication.
Start time: Friday, October 20, 2023, at 6:00 AM UTC
Root cause: A recent update led to a code regression within a portion of infrastructure responsible for facilitating some Microsoft Defender and Exchange Online protection functionalities.
Next update by: Saturday, October 21, 2023, at 6:00 PM UTC