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Disconnect a Security Key from a User’s Account (Salesforce Orgs)
Users can register only one WebAuthn (FIDO2) or Universal Second Factor (U2F) security key with their Salesforce account at a time. If a user loses or replaces their security key, you can disconnect the original key from their account. If a user’s security key stops working, reset it by disconnecting the key; then ask the user to restore the key’s connection to their account by re-registering it. It’s also a good security practice to disconnect all of a user’s verification methods if they leave your company.

