What type of window must be defined retrospectively in Dynatrace?

In Dynatrace, an unplanned maintenance window must be defined retrospectively. This type of window is utilized to account for unexpected events or outages that have already occurred, impacting the performance and availability of services. By defining this window, users can indicate that certain performance data during that period should be excluded from problem detection and analysis, allowing for a more accurate reflection of normal performance metrics after the unplanned issue has been addressed. This retrospective definition is critical because it helps in cleaning up data and preventing false positives in alerts and analysis that could arise from unplanned incidents.

Scheduled maintenance windows, on the other hand, are planned in advance and typically do not need to be defined retrospectively, as they are accounted for in the monitoring configuration before the maintenance occurs. Similarly, configuration and operational maintenance windows are generally associated with planned activities and therefore do not require retrospective definition.