Do you mean that the device is Activation Locked to an Apple ID? Or do you mean there's a problem with the Apple ID and it isn't fully functioning? If the device is Activation Locked, then you'll need to enter the credentials for the Apple ID to unlock it. If you don't know the Apple ID credentials you can attempt to reset them [link|https://iforgot.apple.com|here|new_window=true]. If there is a separate problem with the Apple ID, you may need to contact Apple to resolve the issue. You can contact them through the support options on their website. Good luck!