This article will show how I convert an Office 365 custom domain to Federated Domain In office 365.
Federated Domain Is a domain that Is enabled for a Single Sign On.
To get started you need the Office 365 module Installed and a Global Admin account that can connect to Office 365:
Connect to Office 365
Run the cmdlet below:
Convert-MsolDomainToFederated –DomainName company.com