The default configuration file is what you found, correct? Did you tftp it manually to the system flash:?
If you did, perhaps that would make CCA happy, but if you want to manually reset UC520 (CUE and IOS/CME), you may do it with default to default configuration by using the following commands:
1) CUE: Session to the CUE and restore factory defaults. If you never configured voice mail before, this may not be required, but if you did, you must do this or old data will not be cleaned up and will cause weird behavior from AA trying to reach users by names and when trying to log into a phones voice mail box, you will not have the correct user ID and PW. This will give you a clean system. no users and no voicemail
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