Hello Raul Guchinife,
Thank you for posting in Q&A forum.
You need to install Certification Authority Web Enrollment Role Service on CA server and configure it.
Here is a video with detailed installation steps for your references.
https://www.youtube.com/watch?v=lMqM6YxWrS0
I hope the information above is helpful.
If you have any question or concern, please feel free to let us know.
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