Create self signed certificates using IIS
How to create/use a Self-Signed certificate using Internet Information Service Manager
Generate Your IIS Self Signed Certificate
- On Windows search, type inetmgr and run “Internet Information Services (IIS) Manager”

- Select your server and double-click on the “Server Certificates” icon

On the right pan, click on “Create Self-Signed Certificate..” link

- Give a fiendly name of the certificate
- Click on OK

Your certificate is created and added into the IIS server service.
You can export it for other service like VPN SSTP