In case you experience a connection issue, please supply detailed information where possible.
For information about NAT types, please visit this article: https://support.xbox.com/en-us/xbox-one/networking/nat-error-solution
Please take note that retesting your NAT type, might give a false positive Open result. (restarting your network equipment is required to perform an accurate test)
Settings for your Xbox account Online Privacy / Multiplayer can be managed here: http://account.xbox.com/settings.
How to manage this directly from the Xbox one console and also about child accounts: https://privacy.microsoft.com/en-us/xbox-one-privacy-and-online-safety.
A troubleshoot guide can be found here: https://support.xbox.com/en-US/xbox-one/security/cannot-change-my-privacy-settings
Please contact Xbox support https://support.xbox.com, if you experience any issues with changing these settings.
Keep in mind that we do not have access to your Xbox account here on the bugtracker, please do NOT provide personal information.