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Offline Root CA and Enterprise Issuing CA Lifecycle

Last Modified: 2012-05-07
Hi all,
i've some questions related to the certificate lifecycle and administration doing of a Offline Root CA and an subordinate Enterprise Issuing CA.
I've installed the Root CA with a lifetime of 20 years and an CRL publishing intervall of 3 month.
The Issuing CA is installed for 5 years lifetime.

Which tasks have to be done?
When do i need to bring the Root CA online for which tasks to be done? CRL publishing, Certificate Renew?...
Plesae i need some clarification!
Thank you
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