Azure Blueprint (policy assignment) - Tag value should accept null values so we can put the tag later on.
Azure Blueprint (policy assignment) - Tag value should accept null values. For example, we want to put 'function' tag in each VM and function can be app, db, ad etc. If we put 'app' as a value then all the VMs will have the same tag. We want to be 'function' tag there but we want to put the value at the time of creation as per the role of VM.
Another one, Azure Blueprint (policy assignment). When we delete the blueprint, the blueprint got deleted but the policy does not get deleted. In this case, we have to delete the policy manually from azure policy console.