Post a copy of your script. We can start there and see if anything obvious needs to be modified in your coding.

When we set the computer name, our code does a recon to update the JSS, looks like:

  # Check name is right
  counter=0
  livename=`/usr/sbin/scutil --get ComputerName`
  until [ $livename == $name ]; do
    /usr/sbin/scutil --set LocalHostName "${name}"
    /usr/sbin/scutil --set ComputerName "${name}"
    /usr/sbin/scutil --set HostName "${name}"
    # Set the NetBIOS name
    defaults write /Library/Preferences/SystemConfiguration/com.apple.smb.server NetBIOSName -string "${name}"
    sleep 2
    livename=`/usr/sbin/scutil --get ComputerName`
        if [ "$counter" -gt 4 ]; then
            echo "Breaking loop and failing out as we cannot set the computer name"
        exit 0;
    fi
  done

  dscacheutil -flushcache

  echo "$0: Set machine name to ${name}"
  echo "$0: Updating JSS"
  /usr/local/bin/jamf recon -endUsername ${uun}

Script is:

USERNAME=$(/usr/bin/python -c 'from SystemConfiguration import SCDynamicStoreCopyConsoleUser; import sys; username = (SCDynamicStoreCopyConsoleUser(None, None, None) or [None])[0]; username = [username,""][username in [u"loginwindow", None, u""]]; sys.stdout.write(username + " ");')

create network name using username and DA-prefix

netnameprefix=$"DA-"
netname=$"$netnameprefix$USERNAME"

set hostname and local hostname

sudo scutil --set HostName $netname
sudo scutil --set LocalHostName $netname
exit 0

Even after a jamf recon, nothing updates?

I've got this working, was missing --setComputerName - it's this bit that the inventory must base itself off?