Have you enabled new mobility on 5508 controller ?Both the controller are in same mobility group and there control and data path is up as well? Also check this document to configure mobility : http://www.cisco.com/c/en/us/td/docs/wireless/technology/...

Please attach show tech from both controller and AP.Also check if you have MAC Filtering enabled on the WLAN under layer 2 security ?  

Hi awadhmnyika, Please try a different browser and as said try to configure it via CLI.  Regards,Ashish C 

This is what i understand regarding your setup5508 Anchor Controller --- 3850 Foreign Controller --- AP -- Client. You can run this command on controller to know why client is not connecting : debug client <MAC Address of Client>Also create a test WL...