Lync Server 2013 has introduced an Autodiscover Service where the newer versions of Lync 2010 and Lync 2013 clients prefer Autodiscover over DNS SRV records discover. When SfB / Lync 2013 client can successfully sign in, it can be the Lync Autodiscover Service has been properly configured. However, if you do not configure the legacy DNS SRV discovery properly, this would result the Trio cannot sign-in as Trio only support DNS SRV discovery. See Understanding Autodiscover in Lync Server 2013 in Microsoft TechNet for details.
Polycom Global Services
---------------- The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.
Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels. Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's