The complexity rule ensures that passwords meet the following minimum complexity requirements:
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Not contain the user's account name or parts of the user's full name that exceed two consecutive characters
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Be at least six characters in length
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Contain characters from three of the following four categories:
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English uppercase characters (A through Z)
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English lowercase characters (a through z)
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Base 10 digits (0 through 9)
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Non-alphabetic characters (Supported characters are ~`!#$%\^&*+=-[];,/{}._|":<>?()@
 
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The complexity rule imposes the same requirements as the standard Windows policy “Password must meet complexity requirements.”
To configure the complexity rule
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Follow the steps outlined in Configuring Password Policy Rules.
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On the Policy Rules tab, click Complexity Rule to expand the rule settings.
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Under Complexity Rule, select the Password must meet complexity requirements check box.