Google has announced via the G Suite blog that all G Suite domains have begun being migrated from classic Hangouts to the new Hangouts Meet for new calendar events. The migration began a couple of days ago and is expect to take most of June to complete. The change is slated for all G Suite domains.
Once a domain is migrated, any new calendar events created where a Hangouts meeting is scheduled as part of it, the link to the meeting will be a new Hangouts Meet invite. The good news is that any existing calendar invites with older classic Hangouts information will still work. For now at least.
For those that may not recall, Hangouts Meet is the new and improved Hangouts aimed G Suite customers. It is a significantly better experience than the classic Hangouts and supports things like WebRTC and dramatically improved video quality.
As part of the announcement, Google pointed out that Firefox support for Meet is now supported so long as you are using version 60 or higher of that browser within your domain.
While the new Meet events will be the default going forward for domains once this rolls out, Admins can revert back to the classic Hangouts if they so choose. This can be done by going to Apps > G Suite > Google Hangouts > Meet Settings and unselecting “New meeting experience.”. Google points out that this will be available during the transition period which is a gentle way of saying that this option will, at some point, be going away.