eComm Event Management is a Salesforce solution for managing simple, free events. These types of events have a limited amount of customization and features, which makes launching an event quick and easy.
It's not uncommon to want to include files, including Excel, PDFs, and ICS (to make an 'Add to Calendar' link) to Marketing Cloud emails or eComm's Event Management registration process or emails. Learn how to download a meeting/appointment from Outlook and make it public (there are different options depending on your access).