My elite controller series 2 can't be registered, it says the device serial can't be found....

Hello, Ahbab. Thanks for reaching out! My name is Lucas, and I'm an Independent Advisor and a Microsoft user just like you. I'll be happy to assist you today.

Are you trying to register it on?

https://devicesupport.microsoft.com/

Try to register it on Microsoft Edge using a InPrivate window. Or try a different browser also with a InPrivate / Incognito window.

If it still does not work, please let me know.

As far as I know you can't register any controller I tried to register my elite controller but the serial number was the wrong length

Hello I found this post as I am also having the same issue, I am looking at the serial number on the back of my official Xbox Elite Series 2 controller and trying to enter it when registering a new device. I have a broken joystick and am trying to look up the warranty or initial repairs but I am getting a "We couldn't verify the serial number. Check the serial number and try again." error message but I am definitely entering the serial number in correctly. So confused on what to do and still need help with repairs on my controller.

Hello, I hope you are well.

Please check these steps.

To complain about your Elite Series 2 controller, which is not showing up in your account and has gliding issues, follow these steps:

1. Confirm the registration:

Go to the devices page of your Microsoft account and check if the controller is still registered. If it is not, try registering again with the serial number

You need to contact xbox support to help you set up a repair for elite controllers as you can't simply register them with serial number.