To access the ecobee Switch+ Smart Features you need to take the following steps:
Launch the ecobee app on your mobile device.
Go to the Switches tab at the bottom right. You will only see this screen if you have both switches and thermostats set up in the app.
Tap the name of the switch you want to manage.
Then go to Smart Features at the bottom middle of the screen.
3. Use Vacation Mode
Vacation Mode is a smart feature that randomly turns the light on then randomly turns it off when you're away from home to make it seem as if you're at home.
The feature is only available when your switch is set to operate indoor lighting.
If the switch is set to operate outdoor lighting, you can change the operation mode if you tap the Info symbol ( circle around lower case i ) in the top right then select indoor lighting.
On the Smart Features screen, go to Vacation Mode.