NOTE: When making a 'Webex Call' from Microsoft Teams it will launch Cisco Webex.
Or for step-by-step instructions (including screenshots) see launching through MS Teams for the first time page.
You can call anyone directly from the Microsoft Teams app. (Please note that you may need to give permission before you are able to use the Webex Call menu).
Click the Webex Call option in the navigation bar on the left.
Step by step instructions (including screenshots) see making a call via MS Teams page.
Or a short video is available on the can I make a phone call with Microsoft Teams? page.