Account lockout threshold
Computer Configuration\Windows Settings\Security Settings\Account Policies\Account Lockout Policy
Determines the number of failed logon attempts that causes a user account to be locked out. A locked-out account cannot be used until it is reset by an administrator or until the lockout duration for the account has expired. You can set a value between 1 and 999 failed logon attempts, or you can specify that the account will never be locked out by setting the value to 0.
Failed password attempts against workstations or member servers that have been locked using either CTRL+ALT+DELETE or password-protected screen savers do not count as failed logon attempts.
For more information, see: