Check SPF for all accepted domain in Exchange Online

Check for EXO SPF.ps1

$AcceptedDomains=Get-AcceptedDomain |where {$_.DomainName -notlike "*.mail.onmicrosoft.com"}
#A better approach would be to validate if the domain is user in a primary email address
$DomainWithoutSPF = @()
foreach($AcceptedDomain in $AcceptedDomains){
    $DNS = Resolve-DnsName -Type TXT -Name $AcceptedDomain.DomainName |where{$_.Strings -like "*v=spf1*"}
    if($DNS.strings -like "*include:spf.protection.outlook.com*"){Return
    }elseif($DNS.strings -like "*include:*"){
        foreach($include in $($dns.Strings.split(" ")| where {$_ -like "include:*"})){
            $tDns = Resolve-DnsName -Type TXT -Name $($include.split(":")[-1])
            if($tDNS.strings -like "*include:spf.protection.outlook.com*"){Return}
        }
        
    }
    $DomainWithoutSPF += $AcceptedDomain.DomainName
}
$DomainWithoutSPF