Telstra group managing director for product management, Holly Kramer, said Telstra and Microsoft would collaborate to deliver a "seamless one-click, one-touch user experience".

Microsoft and Telstra's ambition of offering UC in the cloud where all a customer needs is an Internet connection is still in the works, however, as the UC piece requires an on-site Office Communication Server for application integration.

"We are working towards a fully-hosted unified communications service," a Telstra representative said.