mail flow reporting

Mail flow reporting in Exchange Online helps administrators monitor and troubleshoot message delivery. The new Change Optics Report, now in Public Preview, provides a central view of messages that match patterns tied to announced service changes, including those that may be throttled or rejected. This proactive tool turns change management from reactive to measurable, helping large tenants identify legacy traffic that could become operational risks when Microsoft tightens enforcement. The tag covers topics related to Exchange Online mail flow, reporting, and proactive monitoring for service changes.