Recently I was working on a PKI/CA project so I thought to write a short simple blog on how to determine the type of CA you have.
One way that we generally use to determine the type of the CA is to look in the registry with either Regedit or Regedt32 and look at the following path HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Certsvc\Configuration\<your CA name>\CAType.
The CAType REG DWORD value will be set to one of four numeric values, which will represent the type of CA. Your CA types and their numeric representations include:
CAType of 0 (Enterprise Root CA)
CAType of 1 (Enterprise Subordinate CA)
CAType of 3 (Standalone CA)
CAType of 4 (Standalone Subordinate CA)
Hope this helps in any of your projects where you go to an organization for PKI upgrade or similar project and the customer does not have appropriate documentation.
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