If the Webex app is left open on desktop and a call has not been made in a while, when trying to make a call, a pop up will appear that this function is currently unavailable and to speak to an admin. If the app is relaunched, the user can make and receive calls without issue.
Assumption is that this is a firewall related issue as multiple users are affected though have not been able to find more information of the exact cause. Have tried increasing UDP/TCP timeout without an effect on the app.
