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Track Offboarded User Activities in M365
Track Offboarded User Activities in M365
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AdminDroid
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<#
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=============================================================================================
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Name: Track Offboarded User Activities in Microsoft 365 using PowerShell
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Version: 1.0
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website: o365reports.com
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Script Highlights:
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~~~~~~~~~~~~~~~~~
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1.The script uses modern authentication to connect to Exchange Online.
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2.The script can be executed with MFA enabled account too.
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3.Exports report results to CSV file.
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4.The script exports audit log for 180 days by default.
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5.Allows you to keep audit log report for a custom period.
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6.Automatically installs the EXO module (if not installed already) upon your confirmation.
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7.The script is scheduler friendly. I.e., Credential can be passed as a parameter instead of saving inside the script.
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8.The script supports Certificate-based authentication (CBA).
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For detailed Script execution: https://o365reports.com/2024/01/03/track-microsoft-365-offboarded-user-activities-using-powershell/
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============================================================================================
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#>
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Param
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(
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[Parameter(Mandatory = $false)]
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[Nullable[DateTime]]$StartDate,
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[Nullable[DateTime]]$EndDate,
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[string]$UserID,
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[string]$Organization,
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[string]$ClientId,
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[string]$CertificateThumbprint,
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[string]$AdminName,
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[string]$Password
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)
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#Check for EXO module inatallation
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$Module = Get-Module ExchangeOnlineManagement -ListAvailable
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if($Module.count -eq 0)
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{
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Write-Host Exchange Online PowerShell module is not available -ForegroundColor yellow
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$Confirm= Read-Host Are you sure you want to install module? [Y] Yes [N] No
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if($Confirm -match "[yY]")
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{
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Write-host "Installing Exchange Online PowerShell module"
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Install-Module ExchangeOnlineManagement -Repository PSGallery -AllowClobber -Force -Scope CurrentUser
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}
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else
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{
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Write-Host EXO module is required to connect Exchange Online.Please install module using Install-Module ExchangeOnlineManagement cmdlet.
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Exit
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}
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}
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Write-Host Connecting to Exchange Online...
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#Storing credential in script for scheduling purpose/ Passing credential as parameter - Authentication using non-MFA account
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if(($UserName -ne "") -and ($Password -ne ""))
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{
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$SecuredPassword = ConvertTo-SecureString -AsPlainText $Password -Force
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$Credential = New-Object System.Management.Automation.PSCredential $UserName,$SecuredPassword
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Connect-ExchangeOnline -Credential $Credential
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}
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elseif($Organization -ne "" -and $ClientId -ne "" -and $CertificateThumbprint -ne "")
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{
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Connect-ExchangeOnline -AppId $ClientId -CertificateThumbprint $CertificateThumbprint -Organization $Organization -ShowBanner:$false
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}
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else
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{
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Connect-ExchangeOnline
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}
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$MaxStartDate=((Get-Date).AddDays(-179)).Date
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#Retrive audit log for the past 180 days
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if(($StartDate -eq $null) -and ($EndDate -eq $null))
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{
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$EndDate=(Get-Date).Date
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$StartDate=$MaxStartDate
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}
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#Getting start date to audit export report
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While($true)
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{
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if ($StartDate -eq $null)
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{
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$StartDate=Read-Host Enter start time for report generation '(Eg:12/15/2023)'
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}
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Try
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{
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$Date=[DateTime]$StartDate
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if($Date -ge $MaxStartDate)
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{
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break
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}
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else
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{
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Write-Host `nAudit can be retrieved only for the past 180 days. Please select a date after $MaxStartDate -ForegroundColor Red
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return
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}
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}
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Catch
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{
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Write-Host `nNot a valid date -ForegroundColor Red
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}
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}
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#Getting end date to export audit report
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While($true)
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{
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if ($EndDate -eq $null)
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{
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$EndDate=Read-Host Enter End time for report generation '(Eg: 12/15/2023)'
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}
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Try
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{
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$Date=[DateTime]$EndDate
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if($EndDate -lt ($StartDate))
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{
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Write-Host End time should be later than start time -ForegroundColor Red
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return
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}
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break
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}
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Catch
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{
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Write-Host `nNot a valid date -ForegroundColor Red
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}
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}
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$OutputCSV=".\$UserId"+"_ActivityLogReport_$((Get-Date -format yyyy-MMM-dd-ddd` hh-mm` tt).ToString()).csv"
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$IntervalTimeInMinutes=1440 #$IntervalTimeInMinutes=Read-Host Enter interval time period '(in minutes)'
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$CurrentStart=$StartDate
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$CurrentEnd=$CurrentStart.AddMinutes($IntervalTimeInMinutes)
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#Check whether CurrentEnd exceeds EndDate
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if($CurrentEnd -gt $EndDate)
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{
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$CurrentEnd=$EndDate
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}
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if($UserID -eq "")
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{ write-host !!!!!
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$UserID=Read-Host Enter user UPN '(eg:John@contoso.com)'
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}
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Write-host ~~~~~~~~
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$AggregateResults = @()
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$CurrentResult= @()
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$CurrentResultCount=0
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$AggregateResultCount=0
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Write-Host `nRetrieving user activity log from $StartDate to $EndDate... -ForegroundColor Yellow
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$Count=0
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$ExportResult=""
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$ExportResults=@()
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while($true)
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{
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if($CurrentStart -eq $CurrentEnd)
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{
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Write-Host Start and end time are same.Please enter different time range -ForegroundColor Red
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Exit
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}
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#Getting audit log for given time range
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$Results=Search-UnifiedAuditLog -StartDate $CurrentStart -EndDate $CurrentEnd -UserIds $UserID -SessionId s -SessionCommand ReturnLargeSet -ResultSize 5000
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$ResultCount=($Results | Measure-Object).count
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$AllAuditData=@()
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foreach($Result in $Results)
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{
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$Count++
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$MoreInfo=$Result.auditdata
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$AuditData=$Result.auditdata | ConvertFrom-Json
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$ActivityTime=Get-Date($AuditData.CreationTime) -format g
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$UserID=$AuditData.userId
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$Operation=$AuditData.Operation
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$ResultStatus=$AuditData.ResultStatus
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$Workload=$AuditData.Workload
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#Export result to csv
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$ExportResult=@{'Activity Time'=$ActivityTime;'User Name'=$UserID;'Operation'=$Operation;'Result'=$ResultStatus;'Workload'=$Workload;'More Info'=$MoreInfo}
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$ExportResults= New-Object PSObject -Property $ExportResult
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$ExportResults | Select-Object 'Activity Time','User Name','Operation','Result','Workload','More Info' | Export-Csv -Path $OutputCSV -Notype -Append
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}
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Write-Progress -Activity "`n Retrieving audit log from $StartDate to $EndDate.."`n" Processed audit record count: $Count"
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$currentResultCount=$CurrentResultCount+$ResultCount
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if($CurrentResultCount -eq 50000)
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{
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Write-Host Retrieved max record for current range.Proceeding further may cause data loss or rerun the script with reduced time interval. -ForegroundColor Red
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$Confirm=Read-Host `nAre you sure you want to continue? [Y] Yes [N] No
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if($Confirm -match "[Y]")
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{
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Write-Host Agg $AggregateResultCount CurrentResu $CurrentResultCount
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$AggregateResultCount +=$CurrentResultCount
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Write-Host Proceeding audit log collection with data loss
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[DateTime]$CurrentStart=$CurrentEnd
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[DateTime]$CurrentEnd=$CurrentStart.AddMinutes($IntervalTimeInMinutes)
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$CurrentResultCount=0
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$CurrentResult = @()
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if($CurrentEnd -gt $EndDate)
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{
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$CurrentEnd=$EndDate
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}
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}
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else
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{
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Write-Host Please rerun the script with reduced time interval -ForegroundColor Red
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Exit
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}
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}
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if($Results.count -lt 5000)
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{
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#$AggregateResults +=$CurrentResult
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$AggregateResultCount +=$CurrentResultCount
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if($CurrentEnd -eq $EndDate)
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{
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break
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}
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$CurrentStart=$CurrentEnd
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if($CurrentStart -gt (Get-Date))
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{
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break
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}
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$CurrentEnd=$CurrentStart.AddMinutes($IntervalTimeInMinutes)
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$CurrentResultCount=0
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$CurrentResult = @()
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if($CurrentEnd -gt $EndDate)
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{
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$CurrentEnd=$EndDate
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}
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}
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}
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If($AggregateResultCount -eq 0)
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{
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Write-Host No records found
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}
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else
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{
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Write-Host `nThe output file contains $AggregateResultCount audit records `n
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if((Test-Path -Path $OutputCSV) -eq "True")
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{
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Write-Host " The Output file available in:" -NoNewline -ForegroundColor Yellow
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Write-Host $OutputCSV
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Write-Host `n~~ Script prepared by AdminDroid Community ~~`n -ForegroundColor Green
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Write-Host "~~ Check out " -NoNewline -ForegroundColor Green; Write-Host "admindroid.com" -ForegroundColor Yellow -NoNewline; Write-Host " to get access to 1800+ Microsoft 365 reports. ~~" -ForegroundColor Green `n`n
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$Prompt = New-Object -ComObject wscript.shell
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$UserInput = $Prompt.popup("Do you want to open output file?",`
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0,"Open Output File",4)
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If ($UserInput -eq 6)
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{
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Invoke-Item "$OutputCSV"
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}
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}
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}
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#Disconnect Exchange Online session
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Disconnect-ExchangeOnline -Confirm:$false | Out-Null
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