How to force password policy requirements on password resets for user accounts reset by the Administrator?

os: windows server 2008 r2 enterprise

domain level: 2008

forest level: 2000

we have domain administrators in our domain reset passwords user accounts, , passwords administrators set them not being enforced follow our default domain password policy. example, log on domain controller, administrator , can reset password user account blank. 

is there reason domain administrator password resets user accounts not enforced our default domain password policy? there way enforce on password resets domain admins? 

please see following 2 articles , see if answer questions:

http://technet.microsoft.com/en-us/library/dd277399.aspx

http://blogs.technet.com/b/pfesweplat/archive/2012/12/11/do-you-allow-blank-passwords-in-your-environment.aspx

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~fr3dd

Windows Server  >  Security