Get the AzureAD Audit Sign-In Logs and create several CSV files

Invoke-GetAzureADAuditSignInLogs.ps1

<#
	.SYNOPSIS
	Get the AzureAD Audit Sign-In Logs

	.DESCRIPTION
	Get the AzureAD Audit Sign-In Logs and create several CSV files

	.PARAMETER Days
	Days to search

	.EXAMPLE
	PS C:\> .\Invoke-GetAzureADAuditSignInLogs.ps1

	Get the AzureAD Audit Sign-In Logs for the last 24 hours

	.EXAMPLE
	PS C:\> .\Invoke-GetAzureADAuditSignInLogs.ps1 -Days 10

	Get the AzureAD Audit Sign-In Logs for the last 10 days

	.LINK
	Get-AzureADAuditSignInLogs

	.NOTES
	Initial Beta Version
#>
[CmdletBinding(ConfirmImpact = 'None')]
param
(
   [Parameter(ValueFromPipeline,
      ValueFromPipelineByPropertyName)]
   [ValidateNotNull()]
   [ValidateNotNullOrEmpty()]
   [Alias('DaysToSearch')]
   [int]
   $Days = 1
)

begin
{
   #region
   if ($Days -lt 1)
   {
      Write-Error -Exception 'Value to low' -Message 'The given Days Value is below 1' -Category InvalidArgument -TargetObject $Days -RecommendedAction 'Select between 1 and 30' -ErrorAction Stop
      Exit 1
   }

   if ($Days -gt 30)
   {
      Write-Error -Exception 'Value to high' -Message 'The given Days Value is above 30' -Category InvalidArgument -TargetObject $Days -RecommendedAction 'Select between 1 and 30' -ErrorAction Stop
      Exit 1
   }
   #endregion

   # You might want to tweak this a bit!
   $null = (Disconnect-AzureAD -Confirm:$false -ErrorAction SilentlyContinue)
   $null = (Remove-Module -Name AzureAD -Force -ErrorAction SilentlyContinue)
   $null = (Import-Module -Name AzureADPreview -Force -ErrorAction SilentlyContinue)
   $null = (Connect-AzureAD)

   # Garbage Collection
   [GC]::Collect()

   # Cleanup
   $filterAll = $null
   $AzureAdSignInAll = $null
   $AzureAdSignInFail = $null
   $AzureAdSignInGood = $null
   $AzureAdSignInAllCAfail = $null
   $AzureAdSignInFailCAfail = $null
   $AzureAdSignInGoodCAfail = $null

   # Define some defaults
   $StartDateRaw = ((Get-Date).addDays(-$Days))
   $StartDate = ('{0}-{1}-{2}' -f $StartDateRaw.Year, $StartDateRaw.Month, $StartDateRaw.Day)
   $StartDateRaw = $null
   $EndDateRaw = (Get-Date)
   $EndDate = ('{0}-{1}-{2}' -f $EndDateRaw.Year, $EndDateRaw.Month, $EndDateRaw.Day)
   $EndDateRaw = $null
}

process
{
   try
   {
      # Filtering
      $filterAll = ('createdDateTime ge {0} and createdDateTime le {1}' -f $StartDate, $EndDate)

      # Get the Logs
      $AzureAdSignInAll = (Get-AzureADAuditSignInLogs -Filter $filterAll)

      # Rest is done with filtering
      $AzureAdSignInFail = ($AzureAdSignInAll | Where-Object -FilterScript {
            $_.status.errorCode -ne 0
         })
      $AzureAdSignInGood = ($AzureAdSignInAll | Where-Object -FilterScript {
            $_.status.errorCode -eq 0
         })

      #region StructureData
      $AzureAdSignInGood = ($AzureAdSignInGood | Select-Object -Property CreatedDateTime, UserPrincipalName, RiskState, AppId, ClientAppUsed, IpAddress, @{
            N = 'City'
            E = {
               $_.Location.City
            }
         }, @{
            N = 'CountryOrRegion'
            E = {
               $_.Location.CountryOrRegion
            }
         }, @{
            N = 'FailureReason'
            E = {
               $_.Status.FailureReason
            }
         }, ConditionalAccessStatus)

      $AzureAdSignInAll = ($AzureAdSignInAll | Select-Object -Property CreatedDateTime, UserPrincipalName, RiskState, AppId, ClientAppUsed, IpAddress, @{
            N = 'City'
            E = {
               $_.Location.City
            }
         }, @{
            N = 'CountryOrRegion'
            E = {
               $_.Location.CountryOrRegion
            }
         }, @{
            N = 'FailureReason'
            E = {
               $_.Status.FailureReason
            }
         }, ConditionalAccessStatus)

      $AzureAdSignInFail = ($AzureAdSignInFail | Select-Object -Property CreatedDateTime, UserPrincipalName, RiskState, AppId, ClientAppUsed, IpAddress, @{
            N = 'City'
            E = {
               $_.Location.City
            }
         }, @{
            N = 'CountryOrRegion'
            E = {
               $_.Location.CountryOrRegion
            }
         }, @{
            N = 'FailureReason'
            E = {
               $_.Status.FailureReason
            }
         }, ConditionalAccessStatus)
      #endregion StructureData

      #region ConditionalAccessFilter
      # BUG: Does not work as expected
      $AzureAdSignInAllCAfail = ($AzureAdSignInAll | Where-Object -FilterScript {
            (($_.ConditionalAccessStatus -ne 'success') -and ($_.ConditionalAccessStatus -ne 'notApplied'))
         })

      $AzureAdSignInFailCAfail = ($AzureAdSignInFail | Where-Object -FilterScript {
            (($_.ConditionalAccessStatus -ne 'success') -and ($_.ConditionalAccessStatus -ne 'notApplied'))
         })

      $AzureAdSignInGoodCAfail = ($AzureAdSignInGood | Where-Object -FilterScript {
            (($_.ConditionalAccessStatus -ne 'success') -and ($_.ConditionalAccessStatus -ne 'notApplied'))
         })
      #endregion ConditionalAccessFilter

      $TimeStamp = Get-Date -Format yyyyMMdd_HHmmss

      # TODO: Make it a parameter
      $ExportPath = ('C:\scripts\PowerShell\exports\AzureADSignInAudit')

      if (-not (Test-Path -Path $ExportPath))
      {
         $null = (New-Item -Path $ExportPath -ItemType Directory -Force)
      }

      #region Export
      $null = ($AzureAdSignInAll | Export-Csv -Path ($ExportPath + '\AllSignInAuditLogs_' + $TimeStamp + '.csv') -NoTypeInformation -Force -Encoding UTF8)

      $null = ($AzureAdSignInFail | Export-Csv -Path ($ExportPath + '\FailSignInAuditLogs_' + $TimeStamp + '.csv') -NoTypeInformation -Force -Encoding UTF8)

      $null = ($AzureAdSignInGood | Export-Csv -Path ($ExportPath + '\GoodSignInAuditLogs_' + $TimeStamp + '.csv') -NoTypeInformation -Force -Encoding UTF8)

      if ($AzureAdSignInAllCAfail)
      {
         $null = ($AzureAdSignInAllCAfail | Export-Csv -Path ($ExportPath + '\AllSignInAuditLogs_CAFAIL_' + $TimeStamp + '.csv') -NoTypeInformation -Force -Encoding UTF8)
      }

      if ($AzureAdSignInFailCAfail)
      {
         $null = ($AzureAdSignInFailCAfail | Export-Csv -Path ($ExportPath + '\FailSignInAuditLogs_CAFAIL_' + $TimeStamp + '.csv') -NoTypeInformation -Force -Encoding UTF8)
      }

      if ($AzureAdSignInGoodCAfail)
      {
         $null = ($AzureAdSignInGoodCAfail | Export-Csv -Path ($ExportPath + '\GoodSignInAuditLogs_CAFAIL_' + $TimeStamp + '.csv') -NoTypeInformation -Force -Encoding UTF8)
      }
      #endregion Export
   }
   catch
   {
      #region ErrorHandler
      # get error record
      [Management.Automation.ErrorRecord]$e = $_

      # retrieve information about runtime error
      $info = [PSCustomObject]@{
         Exception = $e.Exception.Message
         Reason    = $e.CategoryInfo.Reason
         Target    = $e.CategoryInfo.TargetName
         Script    = $e.InvocationInfo.ScriptName
         Line      = $e.InvocationInfo.ScriptLineNumber
         Column    = $e.InvocationInfo.OffsetInLine
      }

      # output information. Post-process collected info, and log info (optional)
      $info | Out-String | Write-Verbose

      $paramWriteError = @{
         Message      = $e.Exception.Message
         ErrorAction  = 'Stop'
         Exception    = $e.Exception
         TargetObject = $e.CategoryInfo.TargetName
      }
      Write-Error @paramWriteError

      # Only here to catch a global ErrorAction overwrite
      exit 1
      #endregion ErrorHandler
   }
   finally
   {
      # Cleanup
      $filterAll = $null
      $AzureAdSignInAll = $null
      $AzureAdSignInFail = $null
      $AzureAdSignInGood = $null
      $AzureAdSignInAllCAfail = $null
      $AzureAdSignInFailCAfail = $null
      $AzureAdSignInGoodCAfail = $null

      # Garbage Collection
      [GC]::Collect()
   }
}

#region LICENSE
<#
   BSD 3-Clause License
   Copyright (c) 2021, enabling Technology
   All rights reserved.
   Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
   1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
   2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
   3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#>
#endregion LICENSE

#region DISCLAIMER
<#
   DISCLAIMER:
   - Use at your own risk, etc.
   - This is open-source software, if you find an issue try to fix it yourself. There is no support and/or warranty in any kind
   - This is a third-party Software
   - The developer of this Software is NOT sponsored by or affiliated with Microsoft Corp (MSFT) or any of its subsidiaries in any way
   - The Software is not supported by Microsoft Corp (MSFT)
   - By using the Software, you agree to the License, Terms, and any Conditions declared and described above
   - If you disagree with any of the terms, and any conditions declared: Just delete it and build your own solution
#>
#endregion DISCLAIMER