Allora, ho bisogno di eliminare il check delle CRL, per fare questo, come letto sul sito della microsoft, dovrei modificare il metabase di IIS.
Queste sono le istruzioni che ho trovato:

To disable CRL checking at the website level you can change the
CertCheckMode property in the Metabase.

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IIS5 checks the CRL for every certificate presented by the users only if
the "CertCheckMode " metabase property is set to zero. If "CertCheckMode "
has been set to a value greater that zero the CRL won't be checked. The
property locations in the metabase are the following:


/LM/W3SVC (to set this property for the entire web server)
/LM/W3SVC/N (to set this property only at the web sites level)


The simplest way to disable the CRL check is by using adsutil.vbs, located
in the \inetpub\adminscript folder.: the following command will disable the
CRL check for the first web site


cscript adsutil.vbs SET w3svc/1/CertCheckMode 1
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Qualcuno saprebbe aiutarmi, io sinceramente non capisco come e dove vada scritta questa riga:
cscript adsutil.vbs SET w3svc/1/CertCheckMode 1

ciao e grazie