Dial-in Audio Conferencing

Although Lync Online does not natively provide dial-in audio conferencing capability, Plan 2 licensing does allow interoperability with third-party audio conferencing services. The service also allows for scheduling and joining a Lync meeting from any phone, and initiating a call to an external number from within a Lync meeting. Microsoft maintains an up-to-date list of approved audio conferencing partners that can be used for this service on the Office 365 Marketplace site.