Jan 25, 2016 Question: How many Lines can I register using Poly phones with Skype for Business server?
Resolution: UC Software 5.8.0 for VVX phones and UC Software 5.5.2 for Poly Trio added the Hybrid registration feature. Details are in the Admin Guide or => here <= up to 3 different lines. The first one must be Skype for Business / Office 365
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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