By default Office 365 will only show free/busy when users are viewing a meeting room calendar. You can alter this to show the subject instead by running a few simple PowerShell commands.
In order to use the Office 365 services, such as Exchange Online and Skype for Business, with your own domain you need to add it to Office 365. This is done by creating DNS records for your domain and verifying them in Office 365. The process is quite easy and well explained in Office 365, but if you feel like you need some more guidance – check out this post.
In this post I will explain how to establish a connection to Exchange Online, Skype for Business Online and SharePoint Online in PowerShell. It’s pretty straight forward but you need to have the right pre-requisites installed.