If you have an Mobility Express AP that you wan’t to connect to another ME or a WLC controller you can easily convert it to a lighweight or a CAPWAP AP.
Connect to the AP using SSH or the console port. When you are connected go to the enable mode and enter the following command.
ap-type capwap
The AP will now restart, when it’s booted it will connect to a WLC or another ME AP on the network.
Networks and rants 