You can assign access points, switches, and Defender adapters directly from the respective device list, which simplifies the manual onboarding process.
To add a device to a site from a device list:

Note
Selected APs and adapters must be the same model type.
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Note
When working with 802.11ax access points that offer dual-mode support, make sure that the correct discovery options are configured for device adoption into the destination site. For more information, see the ExtremeCloud IQ Controller Deployment Guide.