A Mr. Richard Feder from Fort Lee, New Jersey wrote in:
The Autodesk Inventor Fusion Technology Preview with the boss / base feature cannot mirror; however, the same process hole / cut feature mirror can. Is that true?
Software Quality Assurance Engineer, Alan-Zhenyu Gao, responded swiftly with the answer:
Thank you for contacting us. You are correct in that it is a limitation in our Technology Preview 1. I will pass this issue to our development team. A work around for this scenario is to: Create a base body for the Boss feature and then Mirror the boss on the base body. After the Mirror is created, select a face of the base body, Press Pull, and cut it through. Sorry for the inconvenience!
Responding to customer feedback is alive in the lab.