Hi @El Khamkhami, Ayman ,
As per this Azure document, a scope is a list of one or more specific Azure resources, a specific resource group, or an entire subscription. So, I believe we can't define scope limited to resource type. However, to accomplish your requirement, we could leverage resource type filter as explained in the same Azure document i.e., resource type filter helps the rule to apply only to alerts on resources from the specified resource type. So, you could configure alert processing rule something like shown in below screenshot.