How to Link Your Xbox Live Account to Your Epic Account
In a word, DON'T. Read this first. Epic Games recommends creating a new Epic account for each platform from which you play: PC, Xbox, and Playstation.From Epic Games' Support Center:
**For Xbox Players** Due to limitations of our systems, linking your Xbox and Epic accounts can prevent you from being able to play Fortnite Save the World or Battle Royale on any other platforms. For this reason, we recommend linking your Xbox Live Gamertag to one Epic Account, while playing on PC using a second Epic Account.
STEP 1: Visit the Fortnite Website.
STEP 2: If you're already logged into an account, SIGN OUT.
STEP 3: Click the user icon at the top right of the page and select "Xbox."
STEP 4: Log in using your **Xbox Live credentials.** When you played on console, Epic created a temporary epic account for you based on your Xbox Live credentials, and signing in will allow you to promote it to a full Epic account. (Do not use the credentials for any existing Epic account.)
STEP 5: Once logged in, you will be asked to Register. In order to link the account, you will need to use an Email Address *and* Display Name that are NOT being used on another Epic account. (If you get an "account already linked" error message, you are most likely trying to use an email address or display name that is already in use.)
Bear in mind that all of your save data is tied to your Epic account that your Xbox name is linked to.
Once you've created your new Epic account (or promoted your console account to a full Epic account), you can return to Fortnite Scout and view your console stats with your new Epic username.
↗ How to link your PSN Fortnite name to an Epic Account
↗ How to fix PSN/XBL "account is already linked to an epic account."