“"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
Today I’m excited to share that the Office Universal apps preview for Windows 10 for phone is expected to be available by the end of the month. With this announcement, we’re rounding out our Office on Windows line-up, and I wanted to take the opportunity to explain our strategy of Universal and Desktop apps.