We are looking to move to Office 365. On the E4 level they offer "Enterprise Voice." The E4 package is $22/month/person which for my company would be $2200/month. Along the same line I pay $1800/month for our hosted VOIP system. My thought process is to move to the E4 level of Office 365 for 2200 a month and cancel my VOIP service and use Lync 2013 as my VOIP provider. I have Polycom Soundpoint phones which are on the compatibility list. Basically I end up paying $400 more a month but have the whole suite of Office 365 and VOIP. Has anyone used Lync Server as a VOIP system? I have browsed the MS site but cant find much info on using Lync Server with the Polycom phones.