@Mohan, Anoop Welcome to Microsoft Q & A Community Platform. In order to export azure metrics , you need to enable diagnostic settings for the load balancer. You can follow this document to enable it. You can send this to Log Analytics , archive to a Storage Account or stream to event hub.
For instance, if you send this data to Log Analytics , you can query the logs in Log analytics.
For load balancers, below is a sample query to check the metrics. Based on your requirement, you can modify the query and retrieve necessary details.
AzureMetrics
| where ResourceProvider == "MICROSOFT.NETWORK"and _ResourceId contains "loadbalancers"
| summarize count() by MetricName
1) To export the data from log analytics, you can follow either of the below documents.
- workspace data export
- Export with logic apps
- Query with Azure Data Explorer
- Send To Excel
- Send To PowerBI
2) The document you are referring to is the latest one and the metrics which are suggested are only the ones that can be exported.