How do I move Certificate Authority from a 2003 DC to a replacement 2008 DC?

We are looking to replace our Existing DC, running Server 2003 R2 STD, with a new server running 2008 STD.

I have found the procedure for moving from one 2003 DC to another (here: but will this work when moving to Server 2008?
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Hi Hainsworth,

Provide URL is useful for the W2k3 to W2k3.
FYI In Microsoft technet provided the details about the Backing up and restoring a certification authority. ( It will helpful for your migration.

Let me know it works for you :)

Abdul Hakim
hainsworthAuthor Commented:
But can I move directly from 2003 to 2008 or would i have to temporarily upgrade the original server first?
for more information regarding move CA W2k3 to W2k8 CA
Step by Step details in MS technet:

Abdul Hakim T

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hainsworthAuthor Commented:
Oh ok, sorry i jumped in very quick then... So I'll need to upgrade, thanks.
Does this work if I am migrating from a 32-bit 2003 CA to 2008 R2? (Being that it's 32-bit to x64.)

Thanks for your advice!
ParanormasticCryptographic EngineerCommented:
You cannot upgrade from 32 to 64 bit - it just isn't allowed and won't work.  My advice is install a new CA on the 64 bit and start reissuing certs from that, when you are done then decom the old CA from AD.

How to decom a CA server properly from AD:
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Windows Server 2008

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