Related thread here as well:
https://answers.ea.com/t5/Bug-Reports/Xbox-Attempt-to-connect-to-online-error-code-524/m-p/6535734/highlight/true#M3738
Don't waste your time on the live agents. If you check my post on there, it is the chat dialog with me and a rep. There is 0 help for this and no one from EA actually cares to understand the situation. EA continues to hide behind vague and incomplete data and never gives a full detailed understanding of WHY BF2 will not accept the parental controls defined within the Child Accounts Xbox settings.
The other thing I find completely baffling and absurd is this:
https://help.ea.com/en-us/help/account/give-your-child-access-to-games-on-their-child-account
In this article it has a section labeled:
"What EA games can I let my child play online?"
The games I found to be most interesting is the ability for CHILD accounts to have online access to Battlefield games. These games are rated as MATURE where BF2 is rated as Teen. Why would you grant access to a Mature game but not a Teen game?
In addition, they continue to try and hide behind COPAA. However, this doesn't explain why Child Accounts are allowed to play other games online. The same child account that can't play BF2 because of COPAA can play NHL 17 online. What's the difference?
I wasn't going to buy this game because of the micro-transaction issue. They rolled that back and got my interest. Now, my kids are not able to play online with their friends. I am jumping on the EA ban bandwagon. It's a shame because they continue to get such great IP but they continue to kill the experience with their lack of care for their customer.