An integrated threat protection solution designed to detect, investigate, and respond to cyber threats across Microsoft 365 services.
Hello Dean,
You have reach the Microsoft community and I’m here to help, let’s check first the defender’s provisioning status by going to this link https://security.microsoft.com then navigate to Assets then select Devices tell me what you can see about it. Next go to Microsoft 365 admin center here is the link https://admin.microsoft.com then navigate to Users then select Active users. Select the users whoever is the device owner or yourself and confirm if the Microsoft Defender for Business is checked. If you were able to download the onboarding package as what you mentioned above you must extract the zip file, right click WindowsDefenderATPLocalOnboardingScript.cmd and run as administrator and press Y when prompted.
I hope this answer is helpful if you have further questions feel free to reply back
Regards,
Marcelo