Microsoft 365 Defender - source of device list?

[ChristianFrielingsdorf]

Hi all,

we see a lot of iOS Devices in the Microsoft 365 Defender Portal under "Device Inventory" which are flagged as "can be onboarded" / "onboarding not possible". These devices are not listed in Azure AD (neither registered or Azure AD joined) are not domain-joined. 

How can I discover the source of this device inventory?

Kind regards,

Christian

[#2]

Here is the info about Device DEscovery which is a pretty cool feature:
https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/device-discovery?view=o365...

And it is normal that iOS/Android are not listed in Azure AD Device, registered or Azure AD joined. Only Windows 10 have that capability,