Topic Last Modified: 2013-10-07

Public Instant Messaging Connectivity is a class of federation, and is configured to allow your internal and external Lync Server 2013 users to add contacts from any of the following:

  • As of September 1st, 2012, the Microsoft Lync Public IM Connectivity User Subscription License (PIC USL) is no longer available for the purchase for new or renewing agreements. Customers with active licenses will be able to continue to federate with Yahoo! Messenger until the service shutdown date. An end of life date of June 2014 for AOL and Yahoo! has been announced. For details, see Support for public instant messenger connectivity.

  • The PIC USL is a per-user, per-month subscription license that is required for Lync Server or Office Communications Server to federate with Yahoo! Messenger. Microsoft’s ability to provide this service has been contingent upon support from Yahoo!, the underlying agreement for which will not be renewed.

  • More than ever, Lync is a powerful tool for connecting across organizations and with individuals around the world. Federation with Windows Live Messenger requires no additional user/device licenses beyond the Lync Standard CAL. Skype federation will be added to this list, enabling Lync users to reach hundreds of millions of people through IM and voice.

This class of federation requires the following planning considerations:

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