I need to take my live environment offline while I perform an upgrade.

A Maintenance Window in Dynatrace allows you to suppress monitoring alerts during planned downtime or maintenance activities. When configured, it prevents problem detection and alerting for the specified entities and timeframe.

This ensures that:

Scheduled Synthetic failures during maintenance are not treated as real incidents

Alert noise is reduced

Teams can perform upgrades without triggering unnecessary alerts

Other options are not suitable:

Credential vault manages secrets

Synthetic on-demand execution manually triggers tests

Deleting monitors is not a practical or recommended solution