Subscription1 includes a VM named VM1 and you have an on-premises System Center Service Manager deployment. To have Service Manager create an alert when VM1’s available memory falls below 10%, what should you do first?

To integrate Azure monitoring with an on-premises System Center Service Manager, the IT Service Management Connector (ITSM) is the necessary first step. ITSM allows you to connect Azure Monitor alerts and logs to your existing ITSM solution, such as Service Manager. Once connected, you can configure alert rules in Azure Monitor to trigger incidents or alerts in Service Manager when specific conditions, like low memory on VM1, are met. Creating an automation runbook or deploying a function app would be subsequent steps for custom actions or more complex integrations, but they don't establish the initial connection to Service Manager. Creating a notification is part of an alert rule, but it requires the underlying connector to Service Manager to be in place first.