if (-NOT (Get-Module -ListAvailable -Name ExchangeOnlineManagement)) {
    Install-Module -Name ExchangeOnlineManagement
}

Import-Module ExchangeOnlineManagement

$admin = Read-Host "Exchange admin email or UPN"
Connect-IPPSSession -UserPrincipalName $admin

Remove-PhishSimOverridePolicy -Identity PhishSimOverridePolicy