We have multiple clients across our fleet only connecting to 802.11a where they should be connecting at 802.11n. We are primarily running AP121s with a 5GHz only 802.1x SSID (no TKIP). The APs themselves appear to be advertising 802.11n rates correctly but clients are for some reason dropping to the legacy data rate. We are running HM on prem 6.5r1 and f/w 6.2r1b. Radio and rates are all at defaults. Which tickboxes/dropdowns have we missed? We've had a look through the related posts but can't find the issue in there.