This configuration parameter specifies the complexity requirements for the generation of a random Active Directory password. Each complexity requirement is assigned a numeric value:
English uppercase characters (A through Z) = 1
English lowercase characters (a through z) = 2
Base 10 digits (0 through 9) = 4
Special, non-alphanumeric characters (!, $, #, %, etc...) = 8
The parameter value is the additive value assigned to the different complexity requirements you require of the password.
For example, if you wanted to require the generated password to include at least one uppercase letter, at least one lower case letter, and at least one digit, you would set the value at 1 + 2 + 4 = 7; or:
The default value for this configuration parameter is 7.