What are the standout features of James Hicks's integration of Fastmail with Morgen Calendar?

Based on the available content, it seems that I've been using Morgen Calendar with Fastmail integration and have found it to be quite effective. One of the standout features that I've mentioned is the personal availability tracking, which is particularly useful for managing my schedule.

Another significant update that I've appreciated is the iCloud support in Morgen Calendar Assist. This feature is a big deal and has been a great addition to the service.

However, the specifics of how Fastmail integrates with Morgen Calendar aren't detailed in the content I have. Would you like to know more about how these services work together or are you interested in other features of Morgen Calendar?