We have acs 4.2 SE + remoteAgent which is located on our DC. WLAN with wpa+wpa2[802.1x auth] has been configured and all working perfectly - domain users trying to connect and gets user\pass prompt, after it auth succesfull and wireless access granted. But its a bit complicated with non-domain users, when they trying to connect to this network they get windows security alert because machine authentication not passed(PC not in domain so ACS can't auth this users). So, if i enable machine authentication under external windows database setting, acs succesfully authenticated station but wont promt for user\password. How can we enable prompting for user\pass while still maintain machine auth ?