Hello @AzureKnwGt-8579
Thank you for reaching out to the Microsoft Q&A platform.
Looking at the title of this query, it appears you are inquiring about the Batch pool behavior after defining the auto-scale rule, a feature provided by the VMSS team (see here), rather than the auto-scale feature provided by the Batch team. Is this the scenario you are referring too?
If so, I assume the end-user has to configure the Batch account in user-subscription mode, allowing them to directly manage the VMSS resource (e.g., defining the auto-scale rule for VMSS) after it is provisioned by Batch. Therefore, the answer would differ from my previous response, which was based on the end-user using the auto-scale feature provided by the Batch team.
Could you please provide the specific use case? This will help us answer your question more accurately.If I have answered your query, please click "Accept as answer" as a token of appreciation