I have 5 APs and for some reasons the boss's laptop roams the most but seems a little sticky to the AP that it starts its connection with when first booted up. Is there a place on the R550 to encourage the laptop to reconnect to the nearest AP?
You can enable "Fast BSS Transition" on the WLAN under Advanced >> Radio Control and check if the roaming is happening properly.
You can also set the "Roam-factor" to set the threshold on the AP to disconnect the client when the SNR falls to certain number. This way the client can re-connect to the nearby AP again for better connectivity.
Check out the below article for more information in setting the "Roam-Factor" from Master CLI.