Zoom for Salesforce Lightning dial out not working

I am working on configuring the Salesforce and Zoom For Lightning App(App exchange package) and cant seem to get it to work. Dialing in works fine when i call the zoom number. However, when a user logs into Zoom and tries dialing out theyll get stuck at the "dialing screen" where the number pops up and it says "calling" but doesnt ring. Does anybody have any help/tips to reccomend trying?