Hi,
Thank you for reaching out to the Microsoft community. I just want to confirm something first, when you try to redeem the Robux code, do you see any specific error message, or does the page simply refresh without confirming redemption?
If your Microsoft Rewards Robux code shows as “Not redeemed” but won’t let you redeem it, here are a few things you can try. First, make sure the code is entered exactly as shown, without spaces or typos, and check that your Microsoft account region matches the code’s region since Robux codes can be region-specific.
Next, try redeeming the code through the correct site by going to roblox.com/redeem and signing in with your Roblox account. Enter the code there rather than in Microsoft Rewards.
It’s also worth checking your Microsoft Rewards account at rewards.microsoft.com to confirm the code status. If it still says “Not redeemed” but won’t work, it could be a sync issue. Clearing your browser cache or trying a different device can sometimes resolve this.
If none of these step's work, the best option is to contact Microsoft Rewards Support. You can submit a ticket and include the code, a screenshot of the error, and your account details so they can assist you further.
Hope this helps!
Regards,
Edward