Thanks for the reply!
We can't use the device naming templates though because they don't pick up the service tag, they're only for using variables and sequential numbers unless I'm understanding it wrong?
These are new devices yes, being imaged using a provisioning template booted from a USB stick. We deploy an image and then finish off with provisioning tasks. These are brand new machines out of boxes so they're not picking up existing ldhostname - I think if the machine exists already then it works OK but I could be wrong.
I've seen some rumours about using the %servicetag% variable in the unattend script, does anyone do this and does it work?
Version is 11.0.0.164 (2018) and yes, I take your point about WMI too! It's just frustrating that it worked on Win 7 but not 10, especially annoying as the answer it shows on the right under 'More like this' is the article that *I* wrote about doing it on Win 7...!