Windows Domain Certificate Authority Transfer Without Original Certificate Authority Server

At some point, the we had a server that was a Windows primary domain controller with certificate authority for the domain. That server was taken offline at some point before started and they didn't transfer the certificate authority or root cert, which has subsequently expired. When attempting to create a new root certificate, we receive an access denied message because it's trying to access the old server. In order to issue a new cert, we need to somehow move the certificate authority to the new domain controller, but since the old server no longer exists so we can't do the transfer. Is it possible to somehow create a new certificate authority on the new DC without the original certificate authority, or do we have no choice but  to create a new domain entirely?
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David Johnson, CD, MVPOwnerCommented:
Tear down and rebuild your Certificate Authority is all you can do.
btanExec ConsultantCommented:
Rebuild then since you do not have the root CA or Enterprise CA key (cert). You already "lost" the old CA means you can't locate backups/Private Keys etc..

If you have not "lost" the Root CA, you can still attempt to decom and have new CA up running smoothly (

Also consider two tier instead of only a single tier PKI (meaning Root CA to client directly compared to RootCA to EntCA to Client).

In normal decom of your CA, all the certificates on the client side has to be re-issued again from the scratch, but if they have auto-renew then it is transparent.

One thing to note when we want to use the same CA server name as Older then before joining the new server to the domain we must reset the older CA computer object...

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