Are you expecting to see new software notifications, the software automatically downloaded, or both?
What endpoints or systems are you referring to?
If it's a TC or CE software based endpoint, the Automatic Software Update check will notify of new software, but will not automatically download it. See New Software Download Procedure for TelePresence Endpoints running TC Software for more information if you're running an endpoint with either TC of CE software.
If you want to check the status of the Automatic Software Update tool, you should most likely contact TAC, as they can look into it for you and possibly help solve whatever issue you're having with the update system.