Explanation:
No
Yes
No
The command creates a resource group-scoped deployment stack in RG1 and enables deny settings using - DenySettingsMode DenyWriteAndDelete with -ActionOnUnmanage DetachAll. Deployment stacks manage the resources defined in the template (here, VNet2 and Subnet1) and can apply deny assignments that block changes to managed resources. Microsoft states that deny settings "define the operations that are prohibited on the managed resources" and that "this restriction applies to everyone unless they're explicitly granted access" (for example, excluded principals). Microsoft Learn Therefore, even though Admin1 is Owner at the subscription scope, the deny assignment still prevents delete and write operations against VNet2 outside controlled stack updates, so Admin1 cannot delete VNet2 and cannot add a subnet to VNet2 (adding a subnet is a write/update to the VNet). Microsoft Learn For VNet1, it already exists in RG1 and is not defined in the Bicep file, so it is not a managed resource of the stack. The deny settings apply to managed resources, so they do not block updates to VNet1. Admin2 has the Contributor role scoped to RG1, which Microsoft describes as granting "full access to manage all resources" at that scope (except assigning roles). Microsoft Learn Hence, Admin2 can add a subnet to VNet1.