What is the default password length for a Windows server domain controller?

The default password length for a Windows Server domain controller is set to a minimum of seven characters. This requirement is part of Microsoft's security policy settings, which are designed to promote the use of stronger passwords. A password that is at least seven characters long allows for a wider variation of characters and increases the overall complexity, making it more resistant to brute-force attacks.

In addition to the length, Windows Server also encourages enforcing other password policies, such as complexity requirements, expiration periods, and lockout policies. This combination helps ensure that users create passwords that are not only longer but also more secure, significantly improving the security posture of the domain.

The other options do not align with Microsoft's guidelines for password length. For example, a password length of zero or five provides inadequate security, while 14 would exceed the minimum and is not the default setting, though longer passwords can be enforced through policy settings for higher security standards.