I would like to know if there is any way you can merge an internet (or "other calendar") calendar into your primary calendar. The sync works from the internet calendar into Outlook 2016 & Office 365, but the only way to merge them is to do an overlay.
Unfortunately, an overlay is not sufficient because it is just 2 separate calendars on top of each other. I need them merged as one, so when I share my calendar, others within my organization can see the internet calendar events and my primary calendar events together in one calendar. The overlay only allows ME to see to see them together, not anyone I share with.