Hi,
Since you are working with Windows Server 2003, Standard Edition, you are limited to only using version 1 certificate templates. Most of these are hard-coded as a 1 year validity period. To use custom validity periods, you must implement version 2 certificate
templates. These are only available on enterprise edition on Windows Server 2003. (same story for Windows Server 2008).
You can only issue certificates based on custom version 2 (or version 3) certificate templates in standard edition starting with Windows Server 2008 R2.
Hope it helps.

微软一站式示例脚本库:
http://blogs.technet.com/b/onescript
