Unable to change user password on Linux VM

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http://serverfault.com – I am user xyz on redhat linux VM abc. I cannot change password. abc:/home/xyz>passwd Changing password for user xyz. Changing password for xyz (current) UNIX password: Password changes on the command line are not supported. Please use Active Directory via a Windows login to change your password. passwd: Authentication token manipulation error abc:/home/xyz> any one here knows what could be the root cause? can a user on unix not change his own password? (HowTos)