@question anyone, Thanks for posting in our Q&A. To make it work, we need to ensure both the Defender for Endpoint license and an Intune license are assigned.
https://learn.microsoft.com/en-us/mem/intune/protect/advanced-threat-protection#prerequisites
For the Microsoft Intune license, is it Microsoft Intune Plan 1? If no, please assign this.
https://learn.microsoft.com/en-us/mem/intune/fundamentals/licenses
Please check the above information and if there's any question, feel free to let us know.
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