Maximum PIN length configures the maximum number of characters allowed for the work PIN. The largest number you can configure for this policy setting is 127. The lowest number you can configure must be larger than the number configured in the Minimum PIN length policy setting or the number 4, whichever is greater. If you configure this policy setting, the work PIN length must be less than or equal to this number. If you disable or do not configure this policy setting, the work PIN length must be less than or equal to 127. NOTE: If the above specified conditions for the maximum PIN length are not met, default values will be used for both the maximum and minimum PIN lengths. Counter Measure: Configure this setting depending on your organization's requirements. Potential Impact: The work PIN length may not be strong enough to provide adequate security. Fix: (1) GPO: Computer Configuration\Administrative Templates\Windows Components\Microsoft Passport for Work\PIN Complexity\Maximum PIN length (2) REG: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\PassportForWork\PINComplexity!MaximumPINLength