We have a site hosted in IIS 7.5 AWS server (Windows 2008 server), application is built using Kentico 9, and we use AWS SES as an email server.We have an email sending function which embeds images....

I had a Kentico site that I was using at first without any cloud storage. Now that I have switched to Amazon S3 using their documentation (https://docs.kentico.com/display/K8/Configuring+Amazon+S3)...