we are using azure BizSpark subscription. we are allowed 150USD for free for one month. The issue we are facing once we used 150 and credit become 0 the VM automatically dis
You could do it on Azure account manage Portal.
More information about this please refer to this link:Set up billing or credit alerts for your Microsoft Azure subscriptions
You should ensure Billing Alert Service is active.
Billing Alert Service
Note: You should be Account Admin for your Azure subscription.