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Microsoft's need to register as a telco in countries where it wants to deliver UCaaS has slowed its international aspirations to provide cloud-based UC internationally. So the company has changed its strategy, at least in one country, Australia, where Telstra will provided the PSTN connectivity needed for the service.


  • Telstra, in partnership with Microsoft, has set up an alternative approach to making PSTN connectivity available to Australian businesses wanting to use Office 365 as their corporate telephony service.

Features and Benefits

  • Details how Microsoft has altered its strategy for expanding the international availability of its UCaaS offering.
  • Reports how Telstra has created an innovative new service to make Skype for Business Online Phone System available to Australian businesses years before Microsoft would likely been able.

Key questions answered

  • How has Microsoft changed its strategy for making Phone System available in additional international markets?
  • How does Telstra Calling for Office 365 relate to Microsoft's and Telsta's existing UC services?

Table of contents

Ovum view

  • Summary
  • Telstra connects Office 365 to the PSTN
  • Immediate demand for Office 365 UCaaS in Australia
  • Calling Plan's slow international rollout


  • Further reading
  • Author