I have a new Windows 2008 R2 Server (Standard, German). After installation from CD I enabled RDP Access, installed the Active Directory services and executed dcpromo. After reboot I log in via RDP as Domain Administrator and run Start -> Windows Security -> Change password. This does not work. What ever password I try, i get the error message that the password cannot be changed because of complexity restrictions.
I checked the policy using rsop.msc and everything seems normal. I tried passwords like "Asdf123", "P@ssword", "Letme1n." Which all should work.
I reinstalled several times. Same result. Please help, time is running out :(
The Domain Password policy also has a rule for the minimum age. This enforces that the password cannot be changed twice within one day. This rule does only apply for Domain Controller.