@Phani Kumar Welcome to Microsoft Q & A Community Forum. I assume you are trying to configure log alerts with custom payload. For this you need to disable the common alert schema, as the common schema is not supported for log alerts using webhooks with a custom email subject and/or JSON payload, since the common schema overwrites the custom configurations. Also note, a custom JSON-based webhook isn't supported from API version 2021-08-01
. For sample workload, refer this document.
If you need further assistance on this, kindly provide more context on your requirement.