Azure Monitor: GetAlertSummary API retirement

After the retirement date, the GetAlertSummary API in Azure Monitor is retired. Systems that call the GetAlertSummary API are affected and face a breaking change unless they move to an ARG query. Microsoft states that the ARG query provides all of the functionality of the GetAlertSummary API plus new ones, including the ability to add new fields to the query that returns the alert summary and to be more flexible in that query.

1. Follow the Microsoft migration path to start using an ARG query before the retirement date.
2. For questions, use Microsoft Q&A. With a support plan, create a support request under the service type Alerts and Action Groups.