Hello Craig,

There is no specific on and off buttons on the app but there is a shortcut that will route you to the web portal.

Go to Settings > Phone > Extension Settings

It will take you to the web portal extension settings.

Go to Settings > User Details > Settings & Permissions > User Hours > Edit

User hours are currently only configured via online portal. You can ask for a feature request to create apps that can do the Admin features with an apps here: https://ideas.ringcentral.com/