Elon Musk, owner of X, has alerted users to update a legacy Twitter security feature or risk being locked out of their accounts from November 10.
The notice comes as X continues to deal with cybersecurity concerns following large-scale staff cuts since Musk's takeover.
While platforms like PayPal and WordPress have been facing increasing security attacks, X users are now being reminded to review their two-factor authentication (2FA) settings.
The X safety team posted on October 24: "After November 10, if you haven't re-enrolled a security key, your account will be locked until you: re-enroll; choose a different 2FA method; or elect not to use 2FA."
The message initially caused confusion among users. The company had stated that "all accounts that use a security key as their two-factor authentication method" must re-enrol their key to maintain access. Users could "re-enroll your existing security key, or enrol a new one."
Following user complaints about unclear instructions, X issued a clarification the next day: "To clarify: this change is not related to any security concern, and only impacts Yubikeys and passkeys - not other 2FA methods (such as authenticator apps).
Security keys enrolled as a 2FA method are currently tied to the twitter.com domain. Re-enrolling your security key will associate them with x.com, allowing us to retire the Twitter domain. If this relates to you, you'll be prompted automatically to re-enroll."
The update marks another step in X's gradual transition from its former Twitter identity while maintaining account security for its global users.