Microsoft has made several interactive guides to help IT Pros, Organizations, Dev and other IT people to learn more about Office 365.
Skype for Business
Configuring PSTN Conferencing in Office 365
Deploying Skype for Business Cloud Connector Edition – Introduction
Deploying Skype for Business Cloud Connector Edition – Part 1
Deploying Skype for Business Cloud Connector Edition – Part 2
Deploying Skype for Business Cloud Connector Edition – Part 3
Enabling PSTN Calling in Office 365
Configuring Auto Attendant and Call Queues in Office 365
