Are admin passwords stored in plaintext in SEE Group Policy?

Hi,

I'm trying to validate this question from our AD Engineering team.  We want to use the SEE Group Policy to update client admin passwords on a scheduled basis (like once every 3 months).   They want assurance that the passwords are not stored in plaintext.  I would assume not.  I looked at the ADM files on the domain controller and didnt see them there.  But I want verification from Symantec on this.

Thanks

Roland Thomas