Length Rule
The Length rule rejects passwords that contain too few or too many characters. Longer passwords are generally stronger, so only specify a maximum password length if password compatibility must be maintained with a system that cannot accept long passwords.
Select the Length check box to enable the Length rule.
Select one of the options:
At least specifies the minimum number of characters that passwords must contain. Choose the minimum number of characters from the drop-down list.
No more than specifies the maximum number of characters that passwords can contain. Choose the maximum number of characters from the drop-down list.
Between specifies the minimum and maximum number of characters that passwords can contain. Choose the minimum number of characters from the first drop-down list, and the maximum from the second drop- down list.