Powershell AzureAD Letzte ANmeldezeit Exportieren

Import-Module AzureADPreview

AzureADPreview\Connect-AzureAD

$user = Get-AzureADUser -All $true
$report = @()

$displayName = @{n='DisplayName';e={$PSItem.UserDisplayName}}  
$lastLogon = @{n='LastLogon';e={Get-Date -Date $PSItem.CreatedDateTime -Format G}}  

<#foreach ($u in $user)
{ #>
    $upn = $u.UserPrincipalName
    $report += Get-AzureAdAuditSigninLogs - | Select-Object -Property $displayName,UserPrincipalName,$lastLogon
#} 

$report | Export-Csv -Path ("C:\users\gbu101\last_logon.csv" -f $env:USERPROFILE) -NoTypeInformation -Delimiter ';' -Encoding UTF8  

Import-Module AzureADPreview

AzureADPreview\Connect-AzureAD

$user = Get-AzureADUser -All $true
$report = @()

$displayName = @{n='DisplayName';e={$PSItem.UserDisplayName}}  
$lastLogon = @{n='LastLogon';e={Get-Date -Date $PSItem.CreatedDateTime -Format G}}  

foreach ($u in $user)
{
    $upn = $u.UserPrincipalName
    $report += Get-AzureAdAuditSigninLogs -Filter "userprincipalname eq '$upn'" -Top 1 | Select-Object -Property $displayName,UserPrincipalName,$lastLogon  
}

$report | Export-Csv -Path ("{0}\Desktop\aad_lastlogon.csv" -f $env:USERPROFILE) -NoTypeInformation -Delimiter ';' -Encoding UTF8  

Get-AzureAdAuditSigninLogs : Error occurred while executing GetAuditSignInLogs 
Code: UnknownError
Message: Too Many Requests
InnerError:
  RequestId: e0f3c65e-c3d4-48ee-ae5d-b5ff00475c97
  DateTimeStamp: Mon, 28 Sep 2020 08:16:53 GMT
HttpStatusCode: 429
HttpStatusDescription: 
HttpResponseStatus: Completed
At C:\Ex_Powershell\Office365_Userlist.ps1:14 char:16
+ ...  $report += Get-AzureAdAuditSigninLogs -Filter "userprincipalname eq  ...