Get-sqmSpnReport

    Checks all SQL Server instances on the local computer.

Get-sqmSpnReport -ComputerName 'SQL01' -InstanceFilter 'MSSQLSERVER'

    Checks only the default instance on SQL01.

'SQL01','SQL02' | Get-sqmSpnReport -ContinueOnError

    Checks all instances on two servers; errors are skipped.

$result = Get-sqmSpnReport -ComputerName 'SQL01'
    $result.DetailRows | Where-Object Status -eq 'Missing' | Select-Object Spn, SetSpnCommand

    Returns only missing SPNs with the ready-to-use setspn command.