Troubleshooting Tip: Unable to create a user certificate on the FortiAuthenticator with the error 'cdp_dns_domain_url'

Description

This article describes the issue encountered while trying to create a user certificate on the FortiAuthenticator and how to resolve it.

Scope

FortiAuthenticator.

Solution

The reason for receiving the error 'cdp_dns_domain_url' is a digit or an invalid character in the top-level domain (TLD) of the

FortiAuthenticator's FQDN. Basically, if the TLD consists of any digit or invalid character, as shown below, it will give that error while trying to create a user certificate.  

The following error will be received when trying to create a user certificate via 'Certificate Management -> End Entities -> Users':

To be able to create a user certificate, it is necessary to remove that digit or invalid character from the FQDN.