to support IP address ranges for an existing network when that network profile is used in a VMware Aria Automation cloud template that uses external IPAM integration, you can configure a network profile.
An example is provided within the context of a vendor-specific sample workflow at Configure a network and network profile to use external IPAM for an existing network in VMware Aria Automation. The overall vendor-specific workflow for external IPAM integration is at Tutorial: Configuring VMware Cloud on AWS for VMware Aria Automation.
For related information, see How do I configure a network profile to support an on-demand network for an external IPAM integration in VMware Aria Automation.