As others already pointed out then would need the Agent installed.
One thing that is also possibly though waiting for it to happen is if you are using a NAC like Cisco ICE or HPE ClearPass where can use these as a Source for the Identity Collector.
That way as you move from Wired to Wirelss then the NAC has the log entry for you that the Identity Collector can take to update.
Useful if rolling out something like that but obviously probably easier to roll out the Agent if not rolling out the NAC anyway.