Convert a domain from Federated to Standard (Unavailable ADFS Service)

Have you converted your domain to a federated domain before your Single Sign-On is ready?

This will make your users unable to login to Office 365.

If your ADFS Service is unavailable, run Powershell with Windows Azure/Office 365 Cmdlets from any computer or server.

Connect to Office 365

$LiveCred = Get-Credential
Connect-MsolService -Credentials $LiveCred
Set-MSOLDomainAuthentication -Authentication Managed -DomainName <incert your federated domain.com>
Convert-MSOLFederatedUser -UserPrincipalName <incert your users username>

You will then reset your authentication method to Standard and convert your user from FederatedUser.