Class GroupList {

    [string]$GroupName
    [string]$GroupObjectID


}

Class GroupListMembers {

    [string]$GroupName
    [string]$GroupObjectID
    [array]$GroupMembersip


}

$grouplistResults =  [System.Collections.Generic.List[object]]::new()

foreach ($user in $users) {
    $groups = Get-AzureADUserMembership -ObjectId $User

    foreach ($Group in $groups) {
        $GroupList = [GroupList]::New()
        $grouplist.GroupName = $group.displayname
        $grouplist.GroupObjectID = $group.ObjectID

        [void]$grouplistResults.Add([PSCustomObject]$GroupList)
    }
}


$groupMembershipResults =  [System.Collections.Generic.List[object]]::new()

foreach ($group in $grouplistResults | select GroupName, GroupObjectID -Unique ) {
    write-host "Processing: $($group.GroupName) - ($($group.GroupObjectID))"
    if ($null -ne $($group.GroupObjectID)) {
        $groupinfo = Get-AzureADGroup -ObjectId $group.GroupObjectID
        $groupmembership = Get-AzureADGroupMember -ObjectId $group.GroupObjectID

        $GroupResults = [GroupListMembers]::New()
        $GroupResults.GroupName = $Group.GroupName
        $GroupResults.GroupObjectID = $Group.GroupObjectID
        $GroupResults.GroupMembersip = $groupmembership

        [void]$groupMembershipResults.Add([PSCustomObject]$GroupResults)

    } else {
        write-host "Skipping Exchange Group DL " -ForegroundColor Yellow
    }

}