On-Premises Server Installation Fails - "Invalid digital signature"

The Issue:

The installation of the on-premises server fails due to invalid digital signature



The Reason:

The on-premises server is missing the Digicert Root CA certificate or if you do not have Internet access, or have a restrictive firewall or proxy, setup may be failing to verify the signature because it cannot access the online certificate revocation list (CRL).


The Solution:

In order to resolve the missing certificate issue, please open the certificates manager (you can launch it from Run -> certmgr.msc).

Import the Digicert root ca certificate, it is attached to this article, in case you need it (DigiCertRootCA.cer).


For more information about a second workaround, checking the CRL settings, please review this blog article  

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