Powershell - Getting Distribution Lists that have sender Restrictions - powershell

Question

We have a distribution list (called "TopGroup", for example) that has sub-DLs inside it, as well as normal personal user email accounts alongside those nested DLs. For some reason, only the individual accounts are receiving any mail sent to MasterDL. Any members inside the sub-DLs do not receive anything sent to MasterDL in their inbox. then I have noticed there is restriction (to only allow specific users sending message to specific distribution groups.) on some sub-DLs.BTW I have been using Exchange Server 2013.
script regarding this? What we are looking for is a PowerShell script that can
1 - Identify all nested groups
2 - Identify on each TOP DL check for 2nd layer DL
2 - Identify 2nd layer DL Distribution Lists that have sender Restrictions and get list
3 - Report them and take output to CSV
4 - optional- notify user and manager and IT group via email
it would be output like below :
ParentGroupName SubDL1 Restriction SubDL2 Restriction .... so on
Group Group1 GroupA,GroupB Group2 GroupA,GroupB,Group
Here is my script so far :
Import-Module ActiveDirectory
$groups = Get-ADGroup -Filter "name -like '*'" -SearchBase "OU=Groups,DC=contoso,DC=com" | Select SamAccountName
Foreach ($g in $groups)
{
$member = Get-ADGroupMember $g | ?{$_.ObjectClass -eq "Group"} | Select Name,SamAccountName
foreach ($sg in $member)
{
$sgname = $sg.name
Write-Host $sgname -foregroundcolor "magenta" -backgroundcolor "yellow"
$dg = Get-DistributionGroup -Identity "$sgname"
if ($dg.AcceptMessagesOnlyFromDLMembers.count -ne 0){
Write-Host "$($dg.Name) has mail attribute set" -ForegroundColor Green
Get-DistributionGroup -ResultSize Unlimited -filter {AcceptMessagesOnlyFromDLMembers -ne $null} | select-object Name,#{Name="AcceptMessagesOnlyFromDLMembers";Expression={[string]::join(";",($_.AcceptMessagesOnlyFromDLMembers| foreach {$_.name}) )}}
}
}
elseif($dg.AcceptMessagesOnlyFromDLMembers.count -eq 0){
Write-Host "$($dg.Name) has no mail attribute set" -ForegroundColor Cyan
}
}
}
Error message :
#Test_groupA has mail attribute set Get-ADGroupMember : Cannot bind parameter 'Identity'. Cannot convert value "#{SamAccountName=test}" to type "Microsoft.ActiveDirectory.Management.ADGroup". Error: "Cannot convert the "#{SamAccountName=test}" value of type "Selected.Microsoft.ActiveDirectory.Management.ADGroup" to type "Microsoft.ActiveDirectory.Management.ADGroup"." At line:9 char:31
+ $member = Get-ADGroupMember $g | ?{$_.ObjectClass -eq "Group"} | Select Name,S ...
+ ~~
+ CategoryInfo : InvalidArgument: (:) [Get-ADGroupMember], ParameterBindingException
+ FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.ActiveDirectory.Management.Commands.GetADGroupMember
Thanks,