Manage Logins and Passwords in Replication
Specify the logins and passwords for replication agents when you configure replication. After configuring replication, you can change logins and passwords. For more information, see View and Modify Replication Security Settings. If you change the password for an account used by a replication agent, execute sp_changereplicationserverpasswords (Transact-SQL).
See Also
Concepts
Replication Agent Security Model
Replication Security Best Practices