Issue Reported: 11/08/2021 03:20:00 PM
Microsoft Reference : EX277384
Issue Status: RESTORED
Issue Description: Users weren’t receiving Briefing email.
Scope of impact: Any user expecting Briefing messages is impacted.
Final Update – 12/08/2021 09:36:00 AM: Microsoft’s investigation determined that a portion of infrastructure which facilitates receiving Briefing email in Exchange Online wasn’t performing as efficiently as expected, which resulted in impact. Microsoft has restarted the affected portion of infrastructure and confirmed with internal telemetry that the issue is resolved.