With Certify SSL Manager you can generate free SSL certificates from Lets Encrypt for your website hosted on your servers.
If your website is hosted and running on windows server and having admin access, you can download and install Certify SSL Manager from https://certifytheweb.com/
Lets Encrypt Certificate will be valid for 90 days and you can renew the certificate from the same app.
Additional settings which might help for https configuration on IIS
In case if you required specifying any particular IP on the server for your https domain go to IIS (or type inetmgr on Start menu).
On this post I am using the Certify SSL/TLS Certificate Manger 18.104.22.168 [Community Edition] on Windows 2012 R2 Server.
Last updated on 05-May-2020
(Keep Distance, Stay Safe – Covid-19)