“"Hi Brian, that should work provided you have the Skype for Business client installed on the mobile phone, and you have a data connection. You can download the app from the respective app store. If you've done that and calls still do not arrive, probably best to contact O365 business support. Information on that is at
We want to make it easier for small to midsized businesses to experience the value Office 365 can deliver—like the ability for employees to access team files from anywhere, collaborate in real-time from any device and benefit from enterprise-grade security. Starting today, customers with 50 or more seats of Office 365 can take advantage of our customer success service Microsoft FastTrack to help you onboard and migrate to Office 365.