Is it possible to share MS calendars across Teams? Maybe send an invitation to one Team from another Team? We have many different teams within the organization and sometimes their events overlap. It would be great to see all events on one calendar.
Not really, every team has a group calendar based on membership of the group and no other will have access. I’d suggest if this is going to be surfaced in Teams, create a SharePoint calendar and use it as a tab in Teams and give appropriate permission to it to the Teams that needs it.