When you’re setting up meetings for your candidates/contacts, you can send out an invite to the respective person. For you to be able to do so, you will need to click on the Send invite to candidate/contact by clicking the Actions tab and select the Add Meeting option:
​

You can also do this via the Quick Add button and select Add Meeting:

The schedule will be available in your Calendar and will send an .ics email to the recipient and it will be available on their calendars as well.