Federation and Public IM Connectivity
Applies to: Office 365
Topic Last Modified: 2014-12-12
Lync external connectivity (federation) enables a Lync Online user to connect with users in other organizations that use Lync Online as well as those that host their own Lync Server on-premises. Federated contacts can see presence, communicate by using IM, and make Lync-to-Lync audio and video calls.
All federated communications are encrypted between the IM systems using access proxy servers. Microsoft does not control encryption after messages are passed to the federated partner’s network (if the partner is federated with an on-premises Lync Server or third-party network).
Lync external connectivity requires the consent and correct configuration of both parties of the federation relationship. After the federation is set up by the administrators of both sides, users in each company can see presence and communicate with users in the other company.
Federation in Office 365 is only supported between other Lync/OCS/LCS environments, with appropriately configured Access Proxy or Edge servers. To learn more about Edge server configuration, see Components required for external user access in Lync Server 2013.
|The term “Lync federation” is specific to Lync and should not be confused with the requirements and capabilities of identity federation that are supported in Office 365.|
Following are the federation relationships that are supported by Lync Online and the available modalities:
Lync Server 2013 IM, Presence, Audio, Video, Conferencing
Lync Server 2010 IM, Presence, Audio, Video, Conferencing
Office Communications Server 2007 R2 IM, Presence, Audio, Video, Conferencing
Organizations can set up a hybrid Lync Server 2013 and Lync Online environment in which all users share the same domain, but some users are homed on-premises and some users are homed online. You can also configure hybrid deployments for integration with other Microsoft Office 365 applications, including Exchange Online and SharePoint Online. Hybrid deployments are discussed in detail in the Lync Server 2013 documentation at Lync Server 2013 Hybrid.
To view feature availability across Office 365 plans, standalone options, and on-premise solutions, see Lync Online Service Description.