I keep getting a notice that my Apple ID is changing. What does this mean?
If you're getting this alert, it means that you have at some point registered your oxnardsd.org email address with Apple and created an Apple ID with it.
This kind of an account would be considered a "private" or non-enterprise account
As we move forward with controlling Apple Devices, we can no longer support private Apple ID accounts.
The alert is telling you that you have some time to move any purchases made with your oxnardsd.org account to another private account.