Error code 400 when trying to activate xbox series x in developer mode?

Hi Leonard, my name is Rodrigo. I'm an Independent Consultant and member of the Microsoft community, and I'd love to help you today.

I'm sorry to hear that.

You'll need to contact Support.

Please enter this link:

https://support.microsoft.com/help/28808/microsoft-store-contact-support

You can also request a callback or try the Virtual Agent.

https://support.microsoft.com/home/contact

To use the Virtual Agent:

https://vsa.services.microsoft.com/v1.0/

I hope this helps.

This response has been automatically translated. As a result, there may be grammatical errors or strange expressions.

Hello, first it's a pleasure to be able to help you today.

My name is welcome to the community.

Hello OzzyMiner11, I don't know exactly what device you're trying to activate developer mode on, however try to follow the procedures in the link below.

Xbox One Developer Mode activation

https://learn.microsoft.com/en-us/windows/uwp/x...

Thank you. I get the following error code when trying to display the colours on the Series X if it helps. For the gamer pics and themes, there are no error codes.

0x80a40408

Hello ひ.,

Thank you for sharing this with us and welcome to Xbox Forums.

We understand that you're having trouble activating Dev Mode on your new Xbox Series X. Just to set proper expectation, we do actually have a dedicated forum team for this type of concern we have. Good thing that you got me now, we will try to work on this together.

Before we start, can you confirm if you have already enrolled in the Xbox Development Program and have been approved as a developer?

In the meantime, it's important to note that in order to activate Dev Mode on your Xbox Series X, you need to have a valid Dev Center account. If you don't have one, you'll need to sign up for one before you can proceed with the activation process.

Get Registered



Assuming you have a valid Dev Center account, let's move on to the activation process. When you navigate to aka.ms/activatexbox, you should be brought to a page where you can enter the activation code that you received when you purchased your Dev Mode Activation License. If you're not seeing this page, there could be a few reasons why.



One possibility is that you're not signed-in to your Dev Center account. Make sure that you're signed-in to your account before navigating to aka.ms/activatexbox. If you're not signed in, you may be redirected to the Xbox development consoles tab in Microsoft Partner Center instead of the activation page.



Another possibility is that there may be an issue with the link itself. Try navigating to the activation page directly by going to partner.microsoft.com/en-us/dashboard/development/xbox/activation. This should take you directly to the activation page where you can enter your activation code.



If you're still having trouble activating Dev Mode on your Xbox Series X, I would recommend you proceed to this link Questions - Microsoft Q&A

Note: On the link provided, make sure to look for the option ask a question (top right of the screen) and proceed posting this issue we have. They can help you troubleshoot any issues you may be experiencing and provide additional guidance on how to activate Dev Mode on your console.



I hope this helps! Let me know if you have any other questions or concerns.

Kind regards,



Microsoft Community

Hello Dude Im 1337,

Thank you for reaching out to us about your issue!

Which console are you trying to activate dev mode on? Are you using a console from Xbox One family or the Xbox Series X|S?

If you're using an Xbox One, you have to perform this through the "Dev Mode Activation" app
If you're using an Xbox Series X|S, you have to perform this through the "Xbox Dev Mode" app