What
In a remote session (a session running on another machine), quitting while messages are unsent now shows a notice saying they were "still waiting to be sent when you quit". Before, it said the cloud session had not yet received this machine's files or settings. The dialog shown when folder syncing was offline has been removed, and a step that starts the remote worker was added.
Why
You will no longer see the offline folder sync dialog in remote sessions, and the quit notice now describes unsent messages directly.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is unclear whether offline folder sync is now handled somewhere else.