$siteURL = "https://contoso.sharepoint.com/sites/test"
$userName = "admin@contoso.sharepoint.com"
$Password = "SuperSecretPassword"

# ----------------------------------------------------------------------------

$ScriptPath = split-path -parent $MyInvocation.MyCommand.Definition

Add-Type -Path "C:Gitoffice-365Losse Apps365ApplibSharePointOnlineMicrosoft.SharePoint.Client.dll"
Add-Type -Path "C:Gitoffice-365Losse Apps365ApplibSharePointOnlineMicrosoft.SharePoint.Client.Runtime.dll"

function Add-SPPermissionToListGroup
{
    param (
        [Parameter(Mandatory=$true)][string]$Url,
        [Parameter(Mandatory=$true)][string]$ListName,
        [Parameter(Mandatory=$true)][string]$GroupName,
        [Parameter(Mandatory=$true)][string]$PermissionLevel
    )

    #$web = Get-SPOWeb -Identity $Url

    $list = $Context.web.Lists.GetByTitle($ListName)

    if ($list -ne $null)
    {
        # Ensure that the permissions are not being inherited.
        if ($list.HasUniqueRoleAssignments -eq $False)
        {
            $list.BreakRoleInheritance($True)
        }

        # Modify the permissions.
        if ($Context.web.SiteGroups[$GroupName] -ne $null)
        {
            $group = $Context.web.SiteGroups[$GroupName]
            $roleAssignment = new-object Microsoft.SharePoint.SPRoleAssignment($group)
            $roleDefinition = $Context.web.RoleDefinitions[$PermissionLevel];
            $roleAssignment.RoleDefinitionBindings.Add($roleDefinition);
            $list.RoleAssignments.Add($roleAssignment)
            $list.Update();
            Write-Host "Successfully added $PermissionLevel permission to $GroupName group in $ListName list. " -foregroundcolor Green
        }
        else
        {
            Write-Host "Group $GroupName does not exist." -foregroundcolor Red
        }

    }
}

Function CreateDocumentLibrary {
   [CmdletBinding()]

    Param (
        [Parameter(Mandatory=$true)][string]$Name
    )

    $listTitle = $Name
    $listDescription = $Name
    $listTemplate = 101

    # Creating client context object
    $context = New-Object Microsoft.SharePoint.Client.ClientContext($siteURL)
    $context.credentials = $SPOCred

    #create list using ListCreationInformation object (lci)
    $lci = New-Object Microsoft.SharePoint.Client.ListCreationInformation
    $lci.title = $listTitle
    $lci.description = $listDescription
    $lci.TemplateType = $listTemplate
    $list = $context.web.lists.add($lci)
    $context.load($list)

    #send the request containing all operations to the server
    try {
        $context.executeQuery()
        write-host "info: Created $($listTitle)" -foregroundcolor green
    }

    catch {
        write-host "info: $($_.Exception.Message)" -foregroundcolor red
    }
}

$SPOPass = ConvertTo-SecureString $Password -AsPlainText -Force
$SPOCred = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($userName, $SPOPass)

$Context = New-Object Microsoft.SharePoint.Client.ClientContext($siteURL)
$Context.credentials = $SPOCred

Import-CSV $ScriptPathDocumentLibraries.csv | ForEach-Object {
    $DocLib = $_.DocumentLibrary
    $Group = $_.Group

    #CreateDocumentLibrary -Name $DocLib
    Add-SPPermissionToListGroup -Url $siteURL -ListName $DocLib -GroupName 'Domain Admins' -PermissionLevel 'Full Control'
    Add-SPPermissionToListGroup -Url $siteURL -ListName $DocLib -GroupName $Group -PermissionLevel Contribute

}

$Context.Dispose()

DocumentLibrary,Group
Test1, CustomerLocation-Doc-Test1
Test2, CustomerLocation-Doc-Test2
Test3, CustomerLocation-Doc-Test3
Test4, CustomerLocation-Doc-Test4
Test5, CustomerLocation-Doc-Test5