Update Custom Metrics FAQ

Author: mattmccleary

articles/azure-monitor/app/pre-aggregated-metrics-log-metrics.md

@@ -71,7 +71,7 @@ There are several [ways of sending custom metrics from the Application Insights
 
 ## Custom metrics dimensions and pre-aggregation
 
-All metrics that you send by using [trackMetric](./api-custom-events-metrics.md#trackmetric) or [GetMetric and TrackValue](./api-custom-events-metrics.md#getmetric) API calls are automatically stored in both logs and metrics stores. Although the log-based version of your custom metric always retains all dimensions, the pre-aggregated version of the metric is stored by default with no dimensions. You can turn on collection of dimensions of custom metrics on the [usage and estimated cost](../cost-usage.md#usage-and-estimated-costs) tab by selecting the **Enable alerting on custom metric dimensions** checkbox.
+All metrics that you send using [OpenTelemetry](opentelemetry-add-modify.md), [trackMetric](./api-custom-events-metrics.md#trackmetric) or [GetMetric and TrackValue](./api-custom-events-metrics.md#getmetric) API calls are automatically stored in both logs and metrics stores. These metrics can be found in the customMetrics table in Application Insights and in Metrics Explorer under the Custom Metric Namespace called "azure.applicationinsights". Although the log-based version of your custom metric always retains all dimensions, the pre-aggregated version of the metric is stored by default with no dimensions. You can turn on collection of dimensions of custom metrics on the [usage and estimated cost](../cost-usage.md#usage-and-estimated-costs) tab by selecting the **Enable alerting on custom metric dimensions** checkbox.
 
 :::image type="content" source="./media/pre-aggregated-metrics-log-metrics/001-cost.png" lightbox="./media/pre-aggregated-metrics-log-metrics/001-cost.png" alt-text="Screenshot that shows usage and estimated costs.":::