Hello @roystonpr,
If your internal team is handling to provide you certificate then I think they should know all steps.
If you want to provide them CSR you can use the following link.
How to Generate a Certificate Signing Request (CSR) for Apache Web Server Using OpenSSL - The SSL Store™
Please mention the correct domain in the CSR, otherwise it would not work.
For e.g. your company daomain is abc.com.
Your Dev server URL: dev.abc.com
Your Test server URL: test.abc.com
Your Prod server URL: prod.abc.com
You can create one certificate and it will work on all server like: *.abc.com
otherwise you can create three CSR then you would get three certificate for each domain.
Once you get the certificate then you need to put on your server in Apache folder and need to do some change in config file also.
Apache Open SSL Configuration for Certificate Installation | Sectigo® Official
Web-server configuration | Adobe Campaign
Thanks.
Parvesh.