When Live with Recording is enabled the live stream will start and stop automatically when you start a recording.
Publish when finished
Check this box if you want the recordings to be automatically uploaded to the selected server.
You can limit a recording by setting a maximum duration in minutes, so when you forget a manual started recording it will automatically stop.
Use 0 to disable this feature and e.g. 300 to force a stop after 5 hours.
Start with playlist
In case you have setup a playlist in your vMix project, the playlist will start and stop with recording.