Fine-grained passwords can be implemented by following these tasks:
Raise the Domain Functional Level to 2008 if not already.

Run ADSIedit

Connect to the naming context

Expand <Domain> --> System --> Password Settings Container
Right-click & create Object

CN StaffPasswords ()
msDS-PasswordSettingsPrecedence 10
msDS-PasswordReversibleEncryptionEnabled False
msDS-PasswordHistoryLength 25
msDS-PasswordComplexityEnabled True
msDS-MinimumPasswordLength 12
msDS-MinimumPasswordAge 1:00:00:00
msDS-MaximumPasswordAge 30:00:00:00
msDS-LockoutThreshold 10
msDS-LockoutObservationWindow 0:00:30:00
msDS-LockoutDuration 0:00:30:00

The password policy now needs to be applied to a security group:

Open Active Directory Users and Computers
View --> Advanced Features
Expand <Domain> --> System --> Password Settings Container
Open CustomPassword properties
Edit msDS-PSOAppliesTo attribute
Add AllStaff (Security Group)