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SzymonRabiza-7107 asked DaisyZhou-MSFT commented

Can you have 2 certification authority on 1 AD (2 servers)?

Can you have 2 certification authority on 1 AD (2 servers) or no?

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Hello @SzymonRabiza-7107,
I'm just following up to make sure you received my last reply and that my answers properly address your questions. If you have any further questions or concerns about this post, please let us know.


Best Regards,
Daisy Zhou

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DaisyZhou-MSFT answered

Hello @SzymonRabiza-7107,

Thank you for posting here.

Q: Can you have 2 certification authority on 1 AD (2 servers) or no?
A: Yes, you can have 2 certification authority on 1 AD (2 servers).

For one-tier PKI:

You can have two one-tier CA servers (two different online Enterprise root CA servers) in one AD domain.

ADCS Step by Step Guide: Single Tier PKI Hierarchy Deployment
https://social.technet.microsoft.com/wiki/contents/articles/11750.adcs-step-by-step-guide-single-tier-pki-hierarchy-deployment.aspx

For two-tier PKI:

You can have one two-tier PKI in one AD domain.

Two-tier PKI with one offline Standalone root CA server and one online Enterprise subordinate CA server.
AD CS Step by Step Guide: Two Tier PKI Hierarchy Deployment
https://social.technet.microsoft.com/wiki/contents/articles/15037.ad-cs-step-by-step-guide-two-tier-pki-hierarchy-deployment.aspx

Or two-tier PKI with one online Enterprise root CA server and one online Enterprise subordinate CA server.


Hope the information above is helpful.

Should you have any question or concern, please feel free to let us know.


Best Regards,
Daisy Zhou

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