enabling complexity requirements

I want to add more security on my network by enabling complexity requirements on my current domain default policy (2008 AD). I’m worried about the impact on one domain admin account that runs services, scripts and other automatic task. Over the years this account was used without proper documentation.

My questions is: What will happen when I enable complex password on the domain policy for an account that is configured like this:
•      Domain admin
•      Password never expire
•      Has already a complex password

Thank you
PhysimedAsked:
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Sir LearnalotCommented:
There is no problem. As long as you can login to the domain controller, you can reset the account password to match the new security policy for password complexity from AD. Right click the user and select "Reset Password". Hope this helps, if it does please mark it as the answer. Thank you and have a great day! :)
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PhysimedAuthor Commented:
Thank you for the answer
But I really need to know what are the risks of the action, because admin password must not be changed
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Sir LearnalotCommented:
#1) If the current password already matches the complexity requirements there will be no effect on the account.

#2) Even if you "Reset" the password, you can just set the "new" password as the same thing.... Effectively you are not really changing the password.
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PhysimedAuthor Commented:
Thank you for the answer
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Windows Server 2008

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