GPO failed to change local admin account password

Domain network: WIndows Server 2008 R2
Workstation: Windows 10
GPO purpose: Create one more local admin account and set password. Once it's changed, change it back.
GPO setting:GPO-Local-Admin.JPGQuestion: After the user, who is domain account and part of local administrators group, changed the admintest account password, if the computer reboot, the admintest account password isn't changed back to the GPO setting.
Welcome any suggestion.
Snowy CanadaNetwork AdministratorAsked:
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Dariusz TykaICT Infrastructure Specialist Senior Commented:
It is no longer possible to set/change passwords for user accounts via GPP.  It was disabled after installation one of MS patches. As it was a security risk since those passwords could be decrypted. See more here:

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Snowy CanadaNetwork AdministratorAuthor Commented:
Thank Dariusz for fast solution.
No, that is not the reason. Your screenshot should show a greyed-out password section. Greyed-out, because MS has patched this option away. Yours doesn't show it. That means, you have never installed any security updates on your domain controller in recent years! Very dangerous.

Please install all updates now. DCs are the most endangered servers.
Please be aware that after installing the patches, all policies of that style remain in place and passwords are easily decodable and should be assumed as being leaked! Delete these policies and migrate the remaining settings to new policies AND change the passwords.
What will you do about your goal to reset the admin passwords?
You should not set them to the same value everywhere, that's for sure. The following link describes a concept for safe user support. In it, you will find scripts to randomize passwords, maybe you would like to use those. If you need help, just say.
Snowy CanadaNetwork AdministratorAuthor Commented:
McKnife, thank you so much for the advice.
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Windows 10

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