First, start by logging into the web server for the site.
Now, open up IIS Manager on the server.
Expand the “Web Sites” folder and locate the domain name.
Right-click on the domain name and select “Properties“.
Now click on the “HTTP Headers” tab and select the MIME types button at the bottom.
Now click “New” to add a new MIME type.
Type in the extensions for the MIME type and how its handled.
Now click OK three times and the MIME type should be added correctly.
If you need any assistance with this process, or encounter any issues, please don’t hesitate to contact our Technical Support Department.