http://www.microsoftvirtualacademy.com/product-training/skype-for-business

If you want to learn Lync, Microsoft Virtual Academy is the best place, It is fee of cost and available as and when you need …

Core Solutions of Microsoft Lync Server 2013 Jump Start

Enterprise Voice and Online Services with Lync Server 2013 Jump Start

What’s New in Skype for Business

Lync Network Readiness Assessment

Lync Devices Strategy

Office Guides: Deploying the New Lync Server

Office Guides: Deploying the New Lync Server

Office Guides: Deploying and Configuring a Lync Edge Server

Office Guides: Configuring a Hybrid Deployment of the New Lync Server

Securing Lync Deployments

Lync Top Support Topics and Troubleshooting Tools

Lync Network Assessment Methodologies

Lync Enterprise Voice Applications and Features Updates

Identifying Critical Support Dependencies for Lync Server

Configuring Lync Room System