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Created October 16, 2024 10:58
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Procedure to install Let's Encrypt SSL Certificate on IIS / Windows
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lets-encrypt-ssl-installation-on-iis.md

How to Install Let's Encrypt SSL Certificate on IIS

  1. Open the following link in your browser Win-Acme
  2. Click on the Download link in the menubar and download the latest version
  3. Extract the ZIP file to a folder on your server, (e.g. C:\win-acme)
  4. Open Command Prompt or PowerShell as an Administrator
  5. Navigate to the directory where you extracted win-acme (e.g. C:\win-acme)
  6. Run the following command to start the win-acme client wacs.exe
  7. It will present you with options to create a New SSL Certificate or Renew existing SSL Certificate
  8. Ideally, Select More Options and Add a Scheduled Task that can automatically renew the SSL Certificate

Create SSL Binding in IIS

  1. Open IIS Manager and navigate to your site
  2. In the Bindings panel, verify the HTTPS binding has been added with the new Let's Encrypt SSL Certificate. If it's not added, do the following
  3. Click Add... under Site Bindings
  4. Set Type to https and SSL Certificate to your new Let's Encrypt certificate
  5. Click OK to save changes

Test your Site

  1. Open your browser and go to https://yourdomain.com to ensure SSL certificate is active and valid
  2. Tools like SSL Labs can also be used to test SSL Validity.
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