Not possible natively and Prime Collab Provisioning is end of sale (thankfully, it was problematic). Look at ecosystem vendors such as Akkadian Labs, Kurmi, Stack8, or Unimax; I tend to gravitate toward Akkadian, FWIW.
Also, overwriting existing config of phones and DNs would be dangerous since AD doesn’t enforce uniqueness in the telephone number attributes. It’s one thing to ask for auto-provisioning but I doubt any of the aforementioned vendors will have a zero touch workflow that blatantly repurposes existing config.
PS- It’s a little surprising to hear of a greenfield deployment of the on-prem stack. Nearly every customer wants a SaaS solution these days - such as Webex Calling.