mirror of
https://github.com/admindroid-community/powershell-scripts.git
synced 2025-12-17 08:25:20 +00:00
301 lines
9.5 KiB
PowerShell
301 lines
9.5 KiB
PowerShell
<#
|
||
=============================================================================================
|
||
Name: Audit Email Deletions in shared mailbox using PowerShell
|
||
Version: 1.0
|
||
Website: o365reports.com
|
||
|
||
Script Highlights:
|
||
~~~~~~~~~~~~~~~~~
|
||
1. The script automatically verifies and installs the Exchange Online PowerShell module (if not installed already) upon your confirmation.
|
||
2. Allows to track all shared mailbox email deletions.
|
||
3. Tracks email deletions from a specific shared mailbox.
|
||
4. Allows you to generate a shared mailbox email deletion audit report for a custom period.
|
||
5. The script can be executed with MFA enabled account too.
|
||
6. Exports a specific user’s email deletions activities in shared mailboxes.
|
||
7. Filters deleted emails from shared mailbox by its subject.
|
||
8. It exports the report result to CSV format.
|
||
9. It can be executed with Certificate-based Authentication (CBA) too.
|
||
10. The script is scheduler friendly.
|
||
|
||
For detailed script execution:https://o365reports.com/2025/03/11/audit-email-deletions-in-microsoft-365-shared-mailboxes-powershell/
|
||
============================================================================================
|
||
#>
|
||
Param
|
||
(
|
||
[Parameter(Mandatory = $false)]
|
||
[Nullable[DateTime]]$StartDate,
|
||
[Nullable[DateTime]]$EndDate,
|
||
[string]$SharedMBIdentity,
|
||
[string]$UserId,
|
||
[string]$Subject,
|
||
[string]$UserName,
|
||
[string]$Password,
|
||
[string]$Organization,
|
||
[string]$ClientId,
|
||
[string]$CertificateThumbprint
|
||
)
|
||
|
||
$MaxStartDate=((Get-Date).AddDays(-179)).Date
|
||
|
||
|
||
#Retrive audit log for the past 180 days
|
||
if(($StartDate -eq $null) -and ($EndDate -eq $null))
|
||
{
|
||
$EndDate=(Get-Date).Date
|
||
$StartDate=$MaxStartDate
|
||
}
|
||
#Getting start date to audit export report
|
||
While($true)
|
||
{
|
||
if ($StartDate -eq $null)
|
||
{
|
||
$StartDate=Read-Host Enter start time for report generation '(Eg:09/24/2024)'
|
||
}
|
||
Try
|
||
{
|
||
$Date=[DateTime]$StartDate
|
||
if($Date -ge $MaxStartDate)
|
||
{
|
||
break
|
||
}
|
||
else
|
||
{
|
||
Write-Host `nAudit can be retrieved only for the past 180 days. Please select a date after $MaxStartDate -ForegroundColor Red
|
||
return
|
||
}
|
||
}
|
||
Catch
|
||
{
|
||
Write-Host `nNot a valid date -ForegroundColor Red
|
||
}
|
||
}
|
||
|
||
|
||
#Getting end date to export audit report
|
||
While($true)
|
||
{
|
||
if ($EndDate -eq $null)
|
||
{
|
||
$EndDate=Read-Host Enter End time for report generation '(Eg: 9/24/2024)'
|
||
}
|
||
Try
|
||
{
|
||
$Date=[DateTime]$EndDate
|
||
if($EndDate -lt ($StartDate))
|
||
{
|
||
Write-Host End time should be later than start time -ForegroundColor Red
|
||
return
|
||
}
|
||
break
|
||
}
|
||
Catch
|
||
{
|
||
Write-Host `nNot a valid date -ForegroundColor Red
|
||
}
|
||
}
|
||
|
||
|
||
Function Connect_Exo
|
||
{
|
||
#Check for EXO module inatallation
|
||
$Module = Get-Module ExchangeOnlineManagement -ListAvailable
|
||
if($Module.count -eq 0)
|
||
{
|
||
Write-Host Exchange Online PowerShell module is not available -ForegroundColor yellow
|
||
$Confirm= Read-Host Are you sure you want to install module? [Y] Yes [N] No
|
||
if($Confirm -match "[yY]")
|
||
{
|
||
Write-host "Installing Exchange Online PowerShell module"
|
||
Install-Module ExchangeOnlineManagement -Repository PSGallery -AllowClobber -Force
|
||
}
|
||
else
|
||
{
|
||
Write-Host EXO module is required to connect Exchange Online.Please install module using Install-Module ExchangeOnlineManagement cmdlet.
|
||
Exit
|
||
}
|
||
}
|
||
Write-Host Connecting to Exchange Online...
|
||
#Storing credential in script for scheduling purpose/ Passing credential as parameter - Authentication using non-MFA account
|
||
if(($UserName -ne "") -and ($Password -ne ""))
|
||
{
|
||
$SecuredPassword = ConvertTo-SecureString -AsPlainText $Password -Force
|
||
$Credential = New-Object System.Management.Automation.PSCredential $UserName,$SecuredPassword
|
||
Connect-ExchangeOnline -Credential $Credential -ShowBanner:$false
|
||
}
|
||
elseif($Organization -ne "" -and $ClientId -ne "" -and $CertificateThumbprint -ne "")
|
||
{
|
||
Connect-ExchangeOnline -AppId $ClientId -CertificateThumbprint $CertificateThumbprint -Organization $Organization -ShowBanner:$false
|
||
}
|
||
else
|
||
{
|
||
Connect-ExchangeOnline -ShowBanner:$false
|
||
}
|
||
}
|
||
Connect_Exo
|
||
|
||
|
||
$OutputCSV=".\DeletedEmailsAuditReport_$((Get-Date -format yyyy-MMM-dd-ddd` hh-mm` tt).ToString()).csv"
|
||
$IntervalTimeInMinutes=1440 #$IntervalTimeInMinutes=Read-Host Enter interval time period '(in minutes)'
|
||
$CurrentStart=$StartDate
|
||
$CurrentEnd=$CurrentStart.AddMinutes($IntervalTimeInMinutes)
|
||
|
||
#Check whether CurrentEnd exceeds EndDate
|
||
if($CurrentEnd -gt $EndDate)
|
||
{
|
||
$CurrentEnd=$EndDate
|
||
}
|
||
|
||
|
||
$CurrentResultCount=0
|
||
$AggregateResultCount=0
|
||
Write-Host `nRetrieving deleted emails from $StartDate to $EndDate...
|
||
$ProcessedAuditCount=0
|
||
$OutputEvents=0
|
||
$ExportResult=""
|
||
$ExportResults=@()
|
||
$RetriveOperation="SoftDelete,HardDelete,MoveToDeletedItems"
|
||
|
||
#Check whether to retrieve for all the Shared mailboxes or a specific mailbox
|
||
if($SharedMBIdentity -eq "")
|
||
{
|
||
$SMBs=(Get-Mailbox -ResultSize Unlimited -RecipientTypeDetails SharedMailbox).PrimarySMTPAddress
|
||
}
|
||
else
|
||
{
|
||
#Checking whether the shared mailbox is available
|
||
if((Get-Mailbox -Identity $SharedMBIdentity -RecipientTypeDetails Sharedmailbox) -eq $null)
|
||
{
|
||
Write-Host Given Shared Mailbox does not exist. Please check the name. -ForegroundColor Red
|
||
exit
|
||
}
|
||
}
|
||
|
||
while($true)
|
||
{
|
||
$ResultCount=0
|
||
#Getting email deleted audit data for given time range
|
||
if($UserId.Length -ne 0)
|
||
{
|
||
$Results=Search-UnifiedAuditLog -UserIds $UserId -StartDate $CurrentStart -EndDate $CurrentEnd -Operations $RetriveOperation -SessionId s -SessionCommand ReturnLargeSet -ResultSize 5000
|
||
}
|
||
else
|
||
{
|
||
$Results=Search-UnifiedAuditLog -StartDate $CurrentStart -EndDate $CurrentEnd -Operations $RetriveOperation -SessionId s -SessionCommand ReturnLargeSet -ResultSize 5000
|
||
}
|
||
$ResultCount=($Results | Measure-Object).count
|
||
foreach($Result in $Results)
|
||
{
|
||
$ProcessedAuditCount++
|
||
Write-Progress -Activity "`n Retrieving email deletion activities from $CurrentStart to $CurrentEnd.."`n" Processed audit record count: $ProcessedAuditCount"
|
||
$MoreInfo=$Result.auditdata
|
||
$Operation=$Result.Operations
|
||
$AuditData=$Result.auditdata | ConvertFrom-Json
|
||
$TargetMailbox=$AuditData.MailboxOwnerUPN
|
||
|
||
|
||
$EmailSubject=$AuditData.AffectedItems.Subject
|
||
if($EmailSubject -eq $null)
|
||
{
|
||
$EmailSubject="-"
|
||
}
|
||
$ConversationCount=$EmailSubject.count
|
||
$Subjects=$EmailSubject -join ", "
|
||
|
||
#Filter emails by subject
|
||
if(($Subject.Length -ne 0) -and ($Subjects -notmatch $Subject))
|
||
{
|
||
continue
|
||
}
|
||
|
||
if($SharedMBIdentity -eq "")
|
||
{
|
||
if($SMBs -notcontains $TargetMailbox)
|
||
{
|
||
continue
|
||
}
|
||
}
|
||
elseif($TargetMailbox -ne $SharedMBIdentity)
|
||
{
|
||
continue
|
||
}
|
||
|
||
$ActivityTime=Get-Date($AuditData.CreationTime) #(Get-Date($AuditData.CreationTime)).ToLocalTime() Uncomment to view the Activity Time in local time
|
||
$PerformedBy=$AuditData.userId
|
||
$ResultStatus=$AuditData.ResultStatus
|
||
$Folder=$AuditData.Folder.Path.Split("\")[1]
|
||
$EventData=$AuditData.EventData
|
||
|
||
#Export result to csv
|
||
$OutputEvents++
|
||
$ExportResult=@{'Activity Time'=$ActivityTime;'Shared Mailbox Name'=$TargetMailbox;'Activity'=$Operation;'Performed By'=$PerformedBy;'No. of Emails Deleted'=$ConversationCount;'Email Subjects'=$Subjects;'Folder'=$Folder;'Result Status'=$ResultStatus;'Workload'=$Workload;'More Info'=$MoreInfo}
|
||
$ExportResults= New-Object PSObject -Property $ExportResult
|
||
$ExportResults | Select-Object 'Activity Time','Shared Mailbox name','Performed By','Activity','No. of Emails Deleted','Email Subjects','Folder','Result Status','More Info' | Export-Csv -Path $OutputCSV -Notype -Append
|
||
}
|
||
|
||
$currentResultCount=$CurrentResultCount+($Results.count)
|
||
$AggregateResults +=$Results.count
|
||
Write-Progress -Activity "`n Retrieving audit log for $CurrentStart : $CurrentResultCount records"`n" Total processed audit record count: $AggregateResults"
|
||
if(($CurrentResultCount -eq 50000) -or ($Results.count -lt 5000))
|
||
{
|
||
if($CurrentResultCount -eq 50000)
|
||
{
|
||
Write-Host Retrieved max record for the current range.Proceeding further may cause data loss or rerun the script with reduced time interval. -ForegroundColor Red
|
||
$Confirm=Read-Host `nAre you sure you want to continue? [Y] Yes [N] No
|
||
if($Confirm -notmatch "[Y]")
|
||
{
|
||
Write-Host Please rerun the script with reduced time interval -ForegroundColor Red
|
||
Exit
|
||
}
|
||
else
|
||
{
|
||
Write-Host Proceeding audit log collection with data loss
|
||
}
|
||
}
|
||
#Check for last iteration
|
||
if(($CurrentEnd -eq $EndDate))
|
||
{
|
||
break
|
||
}
|
||
[DateTime]$CurrentStart=$CurrentEnd
|
||
#Break loop if start date exceeds current date(There will be no data)
|
||
if($CurrentStart -gt (Get-Date))
|
||
{
|
||
break
|
||
}
|
||
[DateTime]$CurrentEnd=$CurrentStart.AddMinutes($IntervalTimeInMinutes)
|
||
if($CurrentEnd -gt $EndDate)
|
||
{
|
||
$CurrentEnd=$EndDate
|
||
}
|
||
|
||
$CurrentResultCount=0
|
||
$CurrentResult = @()
|
||
}
|
||
}
|
||
Write-Host `n~~ Script prepared by AdminDroid Community ~~`n -ForegroundColor Green
|
||
Write-Host "~~ Check out " -NoNewline -ForegroundColor Green; Write-Host "admindroid.com" -ForegroundColor Yellow -NoNewline; Write-Host " to get access to 1800+ Microsoft 365 reports. ~~" -ForegroundColor Green `n`n
|
||
|
||
If($AggregateResults -eq 0)
|
||
{
|
||
Write-Host No records found
|
||
}
|
||
|
||
|
||
else
|
||
{
|
||
Write-Host `nThe output file contains $OutputEvents audit records
|
||
if((Test-Path -Path $OutputCSV) -eq "True")
|
||
{
|
||
Write-Host `n" The Output file available in:" -NoNewline -ForegroundColor Yellow; Write-Host $OutputCSV
|
||
$Prompt = New-Object -ComObject wscript.shell
|
||
$UserInput = $Prompt.popup("Do you want to open output file?",`
|
||
0,"Open Output File",4)
|
||
If ($UserInput -eq 6)
|
||
{
|
||
Invoke-Item "$OutputCSV"
|
||
}
|
||
}
|
||
}
|
||
|
||
#Disconnect Exchange Online session
|
||
Disconnect-ExchangeOnline -Confirm:$false -InformationAction Ignore -ErrorAction SilentlyContinue |