CRLFlags and more

Often it is difficult to understand which flags are available on the AD CS CA, e.g. when it comes to CA\CRLFlags
In order to see all available flags including which ones are configured, run:
certutil -v –getreg CA\CRLFlags

That will display all flags. those that are displayed in brackets are not active (in the example above only CRLF_DELETE_EXPIRED_CRLS is enabled). As usual, CRL Flags can be enabled or disabled using certutil, with a + sign to enable and a - sign to disable, followed by the name of the flag.

To enable a flag:

certutil -setreg CA\CRLFlags +CRLF_PUBLISH_EXPIRED_CERTS

To disable it:

certutil -setreg CA\CRLFlags -CRLF_PUBLISH_EXPIRED_CERTS

The same applies to other available settings for the CA, the parameter -v (for verbose) added to certutil displays all available options; try simply running certutil -v -getreg ca

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