You have to get console access to reset 4400 WLC.
Here are the process:
1. First, you need to reset the controller. Enter reset system at the command prompt.
2. At the prompt that asks whether you need to save changes to the configuration, enter Y or N, doesn’t matter what you select. The controller will then reboot.
3. When you are prompted for a username, enter recover-config to restore the factory default configuration.
Press enter and the controller will reset back to factory default.
Regards
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