Question : How do I change server 2003 Computer(Machine) certificate validity to more than one year?

I have an Enterprise CA with an offline root.  I am using the PKI for wireless authentication.  I have thin clients running XPe and are joined to the domain.  However, I have them logged on with a local user account.  I am using a computer certificate to authenticate the machine only.  The setup is working.  The thin client receives a Computer(Machine) certificate.  The validity is set for 1 year.  When I manage the templates, the options for this template is grayed out.  Is there a way to change the properties, or designate another certificate to be issued?

Thanks

Answer : How do I change server 2003 Computer(Machine) certificate validity to more than one year?

check this on the CA:
certutil -getreg ca\ValidityPeriodUnits
certutil -getreg ca\RenewalValidityPeriodUnits

Also, check the validity period defined in the certificate template.

Lastly, if the CA cert has been around for awhile, it may be truncating the issued certs - an issued cert cannot be valid for longer than the validity period of the CA cert.  2 years for an issued cert is actually common from a CA with a validity of 5 years, or 3 years from a 6 year CA cert (the half-life, rounded down)