Greetings! Unfortunately, if you cannot authenticate the account, it cannot be removed from your Cross Save setup. Bungie cannot forcefully remove any accounts for any reason. I would work with [url=https://help.steampowered.com/]Steam Support[/url] and see if they can grant you access back to your account. [quote]Destiny Player Support and Bungie cannot modify platform accounts linked to Bungie.net profiles. To protect player privacy and data, you must be able to log into all linked accounts to prove ownership of them prior to modifying your Cross Save status. If you believe your account has been compromised, please contact the platform’s support for that account to get assistance with account recovery options. For more details on how to help protect your Bungie.net and Destiny accounts in the future, please see our Account Security Guide.[/quote] via the [url=https://help.bungie.net/hc/en-us/articles/360049498031-Destiny-2-Cross-Save-Guide#cross-save-setup-troubleshooting-0-14]Destiny 2: Cross Save Guide[/url].