Enabling a hybrid deployment is a relatively straightforward process and if your organisation has is already using or planning an Exchange hybrid, then some of the requirements will likely be already in place, such as Directory Synchronization and AD FS for the best user experience. Let's take a look at the SFB-specific configuration steps:
Check firewall access rules and open ports
Check required DNS records
Configure on-premises SFB servers
Configure Skype for Business Online within Office 365
Move users from on-premises to cloud
Move users from cloud to on-premises
In our lab environment we will be using Lync Server on-premises but all the PowerShell scripts presented here will work if you are using Skype for Business server in your on-premises network.