This blog post is going to go through enabling and configuring a Skype for Business Online tenant with MFA. Using MFA for authentication for PowerShell sessions provides another layer of security for administrator accounts when managing Office 365 workloads. Adding Modern Authentication introduces new scenarios where multi-factor authentication (MFA) can be used for authenticating remote PowerShell sessions out to Skype for Business Online. Back in April 2017, Microsoft announced the release of support for Modern Authentication for the Skype for Business Online PowerShell Module.