Below is an example powershell script for disabling federated SSO for SharePoint: "claims-authn-sso-disable.ps1".
# # PowerShell Script for disabling federated SSO for SharePoint. # # Determines a directory where this script is placed $ScriptDirectory = Split-Path -Parent -Path $MyInvocation.MyCommand.Definition # Includes common configuration . (Join-Path $ScriptDirectory claims-authn-sso-common.ps1) # This disables claims authentication $webApplication = GetSPWebApplication $webApplicationName $webApplication.UseClaimsAuthentication = 0; $webApplication.Update() # This removes adds the self-signed IdP certificate from the list of trusted root certificates in Sharepoint Remove-SPTrustedRootAuthority $idpTrustedRootCaName # This removed SPTrustedIdentityTokenIssuer Remove-SPTrustedIdentityTokenIssuer $idpName |