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Use Salesforce Authenticator for Multi-Factor Authentication
We all want to keep our online accounts and data secure. Salesforce wants that too, which is why multi-factor authentication (MFA) is required for all logins to the user interface. MFA adds an extra layer of security by requiring you to enter two or more pieces of evidence (or factors) about your identity when you log in. The first factor is something you know, like your username and password combination. The second is a verification method that you have in your possession, like the Salesforce Authenticator mobile app. With MFA, even if hackers steal your password, they can’t log in because they don't have your mobile device with Salesforce Authenticator installed on it.

