From bd94c67ca877dc77da6c38c56157de5148d23995 Mon Sep 17 00:00:00 2001
From: AdminDroid <49208841+admindroid-community@users.noreply.github.com>
Date: Thu, 9 Dec 2021 17:12:54 +0530
Subject: [PATCH] Audit Teams Meeting

Audit Teams Meeting
---
 Audit Teams meetings/AuditTeamsMeetings.ps1 | 292 ++++++++++++++++++++
 1 file changed, 292 insertions(+)
 create mode 100644 Audit Teams meetings/AuditTeamsMeetings.ps1

diff --git a/Audit Teams meetings/AuditTeamsMeetings.ps1 b/Audit Teams meetings/AuditTeamsMeetings.ps1
new file mode 100644
index 0000000..a2ec67c
--- /dev/null
+++ b/Audit Teams meetings/AuditTeamsMeetings.ps1	
@@ -0,0 +1,292 @@
+
+
+Param
+(
+    [Parameter(Mandatory = $false)]
+    [Nullable[DateTime]]$StartDate,
+    [Nullable[DateTime]]$EndDate,
+    [switch]$NoMFA,
+    [string]$UserName,
+    [string]$Password
+)
+
+Function Connect_Modules
+{
+ #Check for EXO v2 module inatallation
+ $Module = Get-Module ExchangeOnlineManagement -ListAvailable
+ if($Module.count -eq 0) 
+ { 
+  Write-Host Exchange Online PowerShell V2 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 V2 module is required to connect Exchange Online.Please install module using Install-Module ExchangeOnlineManagement cmdlet. 
+   Exit
+  }
+ } 
+ #Check for Azure AD module
+ $Module = Get-Module AzureAD -ListAvailable
+ if($Module.count -eq 0) 
+ { 
+  Write-Host Azure AD module is not available  -ForegroundColor yellow  
+  $Confirm= Read-Host Are you sure you want to install the module? [Y] Yes [N] No 
+  if($Confirm -match "[yY]") 
+  { 
+   Write-host "Installing AzureAD PowerShell module"
+   Install-Module AzureAD -Repository PSGallery -AllowClobber -Force
+  } 
+  else 
+  { 
+   Write-Host AzureAD module is required to generate the report.Please install module using Install-Module AzureAD cmdlet. 
+   Exit
+  }
+ }
+
+ #Authentication using non-MFA
+ if($NoMFA.IsPresent)
+ {
+  #Storing credential in script for scheduling purpose/ Passing credential as parameter
+  if(($UserName -ne "") -and ($Password -ne ""))
+  {
+   $SecuredPassword = ConvertTo-SecureString -AsPlainText $Password -Force
+   $Credential  = New-Object System.Management.Automation.PSCredential $UserName,$SecuredPassword
+  }
+  else
+  {
+   $Credential=Get-Credential -Credential $null
+  }
+  Write-Host "Connecting Azure AD..."
+  Connect-AzureAD -Credential $Credential | Out-Null
+  Write-Host "Connecting Exchange Online PowerShell..."
+  Connect-ExchangeOnline -Credential $Credential
+ }
+ #Connect to Exchange Online and AzureAD module using MFA 
+ else
+ {
+  Write-Host "Connecting Exchange Online PowerShell..."
+  Connect-ExchangeOnline
+  Write-Host "Connecting Azure AD..."
+  Connect-AzureAD | Out-Null
+ }
+}
+
+Function Get_TeamMeetings
+{
+ $Result=""   
+ $Results=@()  
+ $Count=0
+ Search-UnifiedAuditLog -StartDate $StartDate -EndDate $EndDate -Operations "MeetingDetail" -ResultSize 5000 | ForEach-Object {
+  $Count++
+  Write-Progress -Activity "`n     Retrieving Teams meetings data from $StartDate to $EndDate.."`n" Processed Teams meetings count: $Count"
+  $AuditData=$_.AuditData  | ConvertFrom-Json
+  $MeetingID=$AuditData.ID
+  $CreatedBy=$AuditData.UserId
+  $StartTime=(Get-Date($AuditData.StartTime)).ToLocalTime()
+  $EndTime=(Get-Date($AuditData.EndTime)).ToLocalTime()
+  $MeetingURL=$AuditData.MeetingURL
+  $MeetingType=$AuditData.ItemName
+  $Result=@{'Meeting id'=$MeetingID;'Created By'=$CreatedBy;'Start Time'=$Star=$StartTime;'End Time'=$EndTime;'Meeting Type'=$MeetingType;'Meeting Link'=$MeetingURL;'More Info'=$AuditData}
+  $Results= New-Object PSObject -Property $Result  
+  $Results | Select-Object 'Meeting id','Created By','Start Time','End Time','Meeting Type','Meeting Link','More Info' | Export-Csv -Path $ExportCSV -Notype -Append 
+ }
+ Write-Host $Count meetings details are exported. -ForegroundColor Green
+}
+
+$MaxStartDate=((Get-Date).AddDays(-89)).Date
+#Getting Teams meeting attendance report for past 90 days
+if(($StartDate -eq $null) -and ($EndDate -eq $null))
+{
+ $EndDate=(Get-Date)#.Date
+ $StartDate=$MaxStartDate
+}
+#Getting start date to generate Teams meetings attendance report
+While($true)
+{
+ if ($StartDate -eq $null)
+ {
+  $StartDate=Read-Host Enter start time for report generation '(Eg:11/23/2021)'
+ }
+ Try
+ {
+  $Date=[DateTime]$StartDate
+  if($Date -ge $MaxStartDate)
+  { 
+   break
+  }
+  else
+  {
+   Write-Host `nAudit can be retrieved only for past 90 days. Please select a date after $MaxStartDate -ForegroundColor Red
+   return
+  }
+ }
+ Catch
+ {
+  Write-Host `nNot a valid date -ForegroundColor Red
+ }
+}
+
+
+#Getting end date for teams attendance report
+While($true)
+{
+ if ($EndDate -eq $null)
+ {
+  $EndDate=Read-Host Enter End time for report generation '(Eg: 11/23/2021)'
+ }
+ 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
+ }
+}
+
+$OutputCSV=".\TeamsMeetingAttendanceReport_$((Get-Date -format yyyy-MMM-dd-ddd` hh-mm` tt).ToString()).csv" 
+$ExportCSV=".\TeamsMeetingsReport_$((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
+}
+
+if($CurrentStart -eq $CurrentEnd)
+{
+ Write-Host Start and end time are same.Please enter different time range -ForegroundColor Red
+ Exit
+}
+
+Connect_Modules
+Get_TeamMeetings
+$CurrentResultCount=0
+$AggregateResultCount=0
+Write-Host `nGenerating Teams meeting attendance report from $StartDate to $EndDate...
+$ProcessedAuditCount=0
+$OutputEvents=0
+$ExportResult=""   
+$ExportResults=@()  
+$RetriveOperation="MeetingParticipantDetail"
+while($true)
+{ 
+ #Getting Teams meeting participants report for the given time range
+ Search-UnifiedAuditLog -StartDate $CurrentStart -EndDate $CurrentEnd -Operations $RetriveOperation -SessionId s -SessionCommand ReturnLargeSet -ResultSize 5000 | ForEach-Object {
+  $ResultCount++
+  $ProcessedAuditCount++
+  Write-Progress -Activity "`n     Retrieving Team meeting participant report from $CurrentStart to $CurrentEnd.."`n" Processed audit record count: $ProcessedAuditCount"
+  $AuditData=$_.AuditData  | ConvertFrom-Json
+  $MeetingID=$AuditData.MeetingDetailId
+  $CreatedBy=$_.UserIDs
+  $AttendeesInfo=($AuditData.Attendees)
+  $Attendees=$AttendeesInfo.userObjectId
+  $AttendeesType=$AttendeesInfo.RecipientType
+  if($AttendeesType -ne "User")
+  {
+   $Attendees=$AttendeesInfo.DisplayName
+  }
+  else
+  {
+   $Attendees=(Get-AzureADUser -ObjectId $Attendees).UserPrincipalName
+  }
+  $JoinTime=(Get-Date($AuditData.JoinTime)).ToLocalTime()  #Get-Date($AuditData.JoinTime) Uncomment to view the Activity Time in UTC
+  $LeaveTime=(Get-Date($AuditData.LeaveTime)).ToLocalTime()
+
+   
+  #Export result to csv
+  $OutputEvents++
+  $ExportResult=@{'Meeting id'=$MeetingID;'Created By'=$CreatedBy;'Attendees'=$Attendees;'Attendee Type'=$AttendeesType;'Joined Time'=$JoinTime;'Left Time'=$LeaveTime;'More Info'=$AuditData}
+  $ExportResults= New-Object PSObject -Property $ExportResult  
+  $ExportResults | Select-Object 'Meeting id','Created By','Attendees','Attendee Type','Joined Time','Left Time','More Info' | Export-Csv -Path $OutputCSV -Notype -Append 
+ }
+
+ $currentResultCount=$currentResultCount+$ResultCount
+ if($CurrentResultCount -ge 50000)
+ {
+  Write-Host Retrieved max record for 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 -match "[Y]")
+  {
+   Write-Host Proceeding audit log collection with data loss
+   [DateTime]$CurrentStart=$CurrentEnd
+   [DateTime]$CurrentEnd=$CurrentStart.AddMinutes($IntervalTimeInMinutes)
+   $CurrentResultCount=0
+   if($CurrentEnd -gt $EndDate)
+   {
+    $CurrentEnd=$EndDate
+   }
+  }
+  else
+  {
+   Write-Host Please rerun the script with reduced time interval -ForegroundColor Red
+   Exit
+  }
+ }
+
+ if($ResultCount -lt 5000)
+ { 
+  if($CurrentEnd -eq $EndDate)
+  {
+   break
+  }
+  $CurrentStart=$CurrentEnd 
+  if($CurrentStart -gt (Get-Date))
+  {
+   break
+  }
+  $CurrentEnd=$CurrentStart.AddMinutes($IntervalTimeInMinutes)
+  $CurrentResultCount=0
+  if($CurrentEnd -gt $EndDate)
+  {
+   $CurrentEnd=$EndDate
+  }
+ }                                                                                             
+ $ResultCount=0
+}
+
+#Open output file after execution
+If($OutputEvents -eq 0)
+{
+ Write-Host No records found
+}
+else
+{
+ Write-Host `nThe Teams meeting attendance report contains $OutputEvents audit records -ForegroundColor Green
+ Write-Host `nFor more Office 365 related PowerShell scripts, check https://o365reports.com -ForegroundColor Cyan
+ if((Test-Path -Path $OutputCSV) -eq "True") 
+ {
+  Write-Host `nThe Teams meetings attendance report available in $OutputCSV -ForegroundColor Cyan
+  $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 "$OutputCSV"   
+   Invoke-Item "$ExportCSV"
+  } 
+ }
+}
+
+#Disconnect Exchange Online session
+Disconnect-ExchangeOnline -Confirm:$false -InformationAction Ignore -ErrorAction SilentlyContinue
+
+<#
+=============================================================================================
+Name:           Audit Microsoft Teams meetings using PowerShell
+For detailed Script execution:  https://o365reports.com/2021/12/08/microsoft-teams-meeting-attendance-report
+============================================================================================
+#>