Cannot activate dev mode on Xbox via Partner Portal (status code 400)
Before you can activate your console, you need a developer account. aka ms activatexbox
By activating your Xbox, you'll be able to access these features and more, making your gaming and entertainment experience more enjoyable and personalized. Cannot activate dev mode on Xbox via Partner
Have questions about Xbox activation? Drop them in the comments below, or visit support.xbox.com for official help. or visit support.xbox.com for official help.