In an AP profile, there is an entry Under FIRMWARE that gives you the option to ENABLE CONFIGURATION UPDATE.
This option is disabled by default. It does not prevent changes made to the Controller/VC from being pushed out to the AP.
The online help reads
Enable Configuration Update
Select the Enable Configuration Update radio button (from within the Automatic Configuration Update field) to enable automatic configuration file updates for the profile from an external location
. If enabled (the setting is disabled by default), provide a complete path to the target configuration file used in the update.