Final answer:
The Account Lockout Threshold Policy is a security measure used to protect user accounts from unauthorized access. By setting the threshold to zero, accounts will never be locked out due to failed login attempts.
Step-by-step explanation:
The Account Lockout Threshold Policy is a security measure used to protect user accounts from unauthorized access. By setting the threshold to zero, accounts will never be locked out due to failed login attempts. This means that even if someone enters an incorrect password multiple times, the account will not be locked.