Thank you for sharing your feedback on this feature as well! Though the ability to upload an ICS file is not an available feature, both our Event Campaigns and RSVP Action Blocks offer your contacts the option to add it to their calendar. Have you tried either of these options as a workaround? Or even the workaround shared in this thread of c reate an calendar entry as an ICS file as a link in your email?
I apologize we do not have a timeline for when the option to upload a file like this directly into your library will be available. T here are many factors that are used to decide what is added to or updated in our product. Us tracking feedback like this allows us to alert our engineers that users like yourself is looking for this as well.
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