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Microsoft account or Windows Live ID when you try to switch your Xbox gamertag to a different Microsoft account, this might mean that your Xbox Live account and your Microsoft account are associated
with different countries or regions. To fix this, you’ll need to update your country/region info in your account.
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Try the solution described here:

https://answers.microsoft.com/en-us/xbox/forum/all/xbox-not-working-error-0x409-0x80080005/cb2a44cc-2cf4-450b-82c1-79bb0bd722f7

Hi there,

Remeeming errors can be caused by issues on the account itself. Be sure to check if your billing information is correct at
http://billing.microsoft.com and also check
http://account.microsoft.com/services for any outstanding amount issues, these need to be sorted prior to being able to redeem codes.

After that try redeeming the code on both xbox console and via xbox.com/redeemcode

Also check that the Xbox Live account , the console and code all match region wise, using different regions for any of them cause issues too.

If you can't find anything wrong and it is still not working, best thing to do is to contact official Xbox Support via Phone or Microsoft Support Chat at
http://support.xbox.com/contact-us they can do a more indepth look into this issue.

Hab das selbe Problem. Schau mal hier nach, da wurden ein paar Lösungsmöglichkeiten vorgestellt.

https://answers.microsoft.com/de-de/windows/forum/all/xbox-beta-keine-anmeldung-m%C3%B6glich/ba66e60e-bffb-405a-9f31-76494f71dd9d

Hat bei mir leider nix gebracht, aber vllt hast du ja mehr Glück.

[Edit - Translation] - I have the same problem. Take a look here, there are a few possible solutions presented.

https://answers.microsoft.com/de-de/windows/forum/all/xbox-beta-keine-anmeldung-m%C3%B6glich/ba66e60e-bffb-405a-9f31-76494f71dd9d

Did nothing for me, but maybe you are more lucky.

Unistall It and install It again then try to sig in.

all Ready tried that… Nothing changed