@Mayday, Thanks for posting in Q&A.
Based as I know, the Microsoft Intune Plan 1 is the Microsoft Intune license which include the following featured:
- Cross-platform endpoint management
- Built-in endpoint security
- Mobile application management
- Endpoint analytics
- Microsoft Configuration Manager2
https://www.microsoft.com/en-us/security/business/microsoft-intune-pricing
And this is a user based license. For device license, it has some limitation and you need to buy separately.
https://learn.microsoft.com/en-us/mem/intune/fundamentals/licenses#device-only-licenses
So for your situation, you can just assign the license to the user who will enroll the devices. If you have more questions about license, you can contact our licensing support to get more help:
https://learn.microsoft.com/en-us/licensing/licensing-orders-invoices-payments-support
And to do device enroll, there are many methods we can choose. Different method suit for different situation. For example, we can choose BYOD enrollment for windows personal devices. Choose Autopilot enrollment method, for the corporate devices which is new. To know more details, you can read the following link as a reference:
Windows Enrollment
https://learn.microsoft.com/en-us/mem/intune/fundamentals/deployment-guide-enrollment-windows
Android Enrollments
https://learn.microsoft.com/en-us/mem/intune/fundamentals/deployment-guide-enrollment-android
iOS/iPadOS enrollments
https://learn.microsoft.com/en-us/mem/intune/fundamentals/deployment-guide-enrollment-ios-ipados
MacOS enrollments:
https://learn.microsoft.com/en-us/mem/intune/fundamentals/deployment-guide-enrollment-macos
Linux enrollments
https://learn.microsoft.com/en-us/mem/intune/fundamentals/deployment-guide-enrollment-linux
Hope it can help.
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