As long as your Hyper-V underlying licensing is in place, this is a good approach to activate Microsoft virtual machines:
A nice writeup on the topic here:
https://redmondmag.com/articles/2019/10/03/automating-vm-activation-in-hyperv.aspx
When swapping out your Sonicwall Gen6 for a newer Gen7 the config needs to be converted,- unless you want to start
Check available optional features: DISM /Online /Get-Capabilities Install an optional feature: DISM /Online /Add-capability /capabilityname:Media.MediaFeaturePack~~~~0.0.1.0
Check AD retention tombstone value: Import-Module ActiveDirectory $ADForestconfigurationNamingContext = (Get-ADRootDSE).configurationNamingContext $DirectoryServicesConfigPartition = Get-ADObject -Identity “CN=Directory Service,CN=Windows NT,CN=Services,$ADForestconfigurationNamingContext” -Partition $ADForestconfigurationNamingContext -Properties *