PowerShell 7 · Azure CLI · verified IPAM allocation evidence
PS> .\scripts\Start-AzureVirtualNetworkManagerWorkshop.ps1 `
    -SubscriptionId $subscriptionId -Stage Validate

[PASS] Four distinct /20 allocations, unused reservation, four members,
       no SSH allow, blocked 8080, and open 8443 are verified.

VNet                    Prefix
----                    ------
vnet-avnm-core-we       10.140.224.0/20
vnet-avnm-app1-we       10.140.192.0/20
vnet-avnm-app2-we       10.140.208.0/20
vnet-avnm-edge-we       10.140.128.0/20

PS> az network manager ipam-pool static-cidr show ... `
    --query properties.addressPrefixes[0] -o tsv
10.140.240.0/20  # reserved and unused