I think a username field of /api/location/v3/clients is based on 802.1x username. Is this correct?
Table 7 Parameter Details
username --- Clients with user name
Yes. Regarding using the UserName field in CMX, please see "The CMX Connect Service" in https://www.cisco.com/c/en/us/td/docs/wireless/mse/10-4/cmx_config/b_cg_cmx104.html
Also, see Wireless LAN Controller Web Authentication Configuration Example - Cisco for information on 802.1x username on WLC. There is also a nice blog on WLC - Web authentication here https://mrncciew.com/2013/03/21/wlc-web-authentication/
Quick question, why are the clients on the cmx location sandbox has no username? Are the iot devices which maybe the reason why it has no username? Thanks
THe sandboxes use a WLC simulator call TSIM. It may support wireless client parameters. I will check with the TSIM folks to see if we can add this feature.