A few things:
- make sure that when you deploy your VM make sure is running 6.6.8 so you can do the backup/restore with no issues, then you can upgrade the VM instance to 6.7 (less downtime this way)
- If any certificates were installed make sure to make sure to download the cert/private key since the certs are not included in the backup , also you need to know the private key password.
- Add the VM instance to the domain.
- I recommend you create a test SSID and make sure everything works before moving it over.