You can still use a capolicy.inf file in %systemroot% directory (e.g. c:\Windows) to get rid of the default CDP/AIA entries for the root cert, however it will still be configured for issuing the subordinate certs until you update them. Example:
220.127.116.11 = AwIBBg==
Critical = 18.104.22.168
You can use the following basic installation command for the offline root install (note there are many other options you can add into this):
Install-CertificationAuthority -CAName "YourRootCAName" -CADNSuffix "YourDomainDN -or- O=Your Company Name,C=2 letter country code" -CAType "Standalone Root" -KeyLength 2048 -HashAlgorithm SHA256 -ValidForYears 15
for -CADNSSuffix value see this article:
(even though it is not part of your domain, if it is used internally to your domain then you might want to use the AD value, otherwise just use an organizational identifier so it has more meaning than just the CA name).
The CDP & AIA values need to get done manually or via batch file (certutil -setreg) - figuring out the batch file values tends to be a long discussion - it is usually just easier to put the values you want into a txt file and copy/paste via the GUI.
If there is no GUI then I would suggest configuring on a test box CA and exporting the following registry key and parse the following values (note they are encoded when you export them):
You can view them with 'certutil -getreg ca\CRLPublicationURLs' etc.