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Export DLs and Their Members & Owners
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AdminDroid
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284
Export Distribution Groups/GetDistributionGroups.ps1
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284
Export Distribution Groups/GetDistributionGroups.ps1
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<#
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=============================================================================================
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Name: Get distribution groups report
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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. Exports distribution groups with allowed / blocked external senders.
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2. Helps to identify empty distribution groups.
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3. Allows to filter results based on group members count.
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4. Bulk import specific DLs and get the report on those specific DLs.
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5. The script automatically verifies and installs the Exchange Online PowerShell module (if not installed already) upon your confirmation.
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6. The script can be executed with MFA enabled account too.
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7. It can be executed with Certificate-based Authentication (CBA) too.
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8. Exports DL’s members count based on Member Type such as user mailbox, group mailbox, etc.
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9. The script is scheduler friendly and exports the report result to CSV format.
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10. This script exports output in 2 CSV files. One with DL details and another with membership details.
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For detailed script execution: https://o365reports.com/2025/03/04/export-distribution-groups-report-in-microsoft-365/
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============================================================================================
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#>
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Param
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(
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[Parameter(Mandatory = $false)]
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[string]$GroupNamesFile,
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[switch]$IsEmpty,
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[int]$MinGroupMembersCount,
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[Nullable[boolean]]$ExternalSendersBlocked = $null,
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[string]$UserName,
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[string]$Password,
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[string]$Organization,
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[string]$ClientId,
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[string]$CertificateThumbprint
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)
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Function Get_members
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{
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$DisplayName=$_.DisplayName
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Write-Progress -Activity "`n Processed Group count: $Count "`n" Getting members of: $DisplayName"
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$Alias=$_.Alias
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$EmailAddress=$_.PrimarySmtpAddress
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$GroupType=$_.GroupType
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$ManagedBy=$_.ManagedBy
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$ExternalSendersAllowed=$_.RequireSenderAuthenticationEnabled
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if(($ExternalSendersBlocked -ne $null) -and ($ExternalSendersBlocked -ne $ExternalSendersAllowed))
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{
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$Print=0
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}
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#Get Distribution Group Authorized Senders
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$AcceptMessagesOnlyFrom=$_.AcceptMessagesOnlyFromSendersOrMembers
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$AuthorizedSenders=""
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if($AcceptMessagesOnlyFrom.Count -gt 0)
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{
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foreach($item in $AcceptMessagesOnlyFrom)
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{
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$AuthorizedSenders=$AuthorizedSenders+$item
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if($AcceptMessagesOnlyFrom.indexof($item) -lt (($AcceptMessagesOnlyFrom.count)-1))
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{
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$AuthorizedSenders=$AuthorizedSenders+","
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}
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}
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}
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elseif($ExternalSendersAllowed -eq "True")
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{
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$AuthorizedSenders="Only Senders in Your Organization"
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}
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else
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{
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$AuthorizedSenders="Senders inside & Outside of Your Organization"
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}
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$Manager = @()
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if($_.ManagedBy.Count -gt 0)
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{
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foreach($ManageBy in $ManagedBy)
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{ #Verify if manager property returned as ID and convert it to user-identifiable name
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if($ManageBy -match '(?im)^[{(]?[0-9A-F]{8}[-]?(?:[0-9A-F]{4}[-]?){3}[0-9A-F]{12}[)}]?$')
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{
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if($ManagerHash.ContainsKey($ManageBy))
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{
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$ManagerName=$ManagerHash[$ManageBy]
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}
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# Retrieve the display name for the ID
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else
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{
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$ManagerName=(Get-EXORecipient -Identity $ManageBy).DisplayName
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$ManagerHash[$ManageBy]=$ManagerName
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}
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$ManageBy=$ManagerName
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}
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$Manager+=$ManageBy
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}
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$Manager= $Manager -join ","
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}
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$Recipient=""
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$RecipientHash=@{}
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for($KeyIndex = 0; $KeyIndex -lt $RecipientTypeArray.Length; $KeyIndex += 2)
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{
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$key=$RecipientTypeArray[$KeyIndex]
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$Value=$RecipientTypeArray[$KeyIndex+1]
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$RecipientHash.Add($key,$Value)
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}
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$Members=Get-DistributionGroupMember -ResultSize Unlimited -Identity $EmailAddress
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$MembersCount=($Members.name).Count
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#GroupSize Filter
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if(([int]$MinGroupMembersCount -ne "") -and ($MembersCount -lt [int]$MinGroupMembersCount))
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{
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$Print=0
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}
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#Check for Empty Group
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elseif($MembersCount -eq 0)
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{
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$Member="No Members"
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$MemberEmail="-"
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$RecipientTypeDetail="-"
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Print_Output
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}
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#Loop through each member in a group
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else
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{
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foreach($Member in $Members)
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{
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if($IsEmpty.IsPresent)
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{
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$Print=0
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break
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}
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$RecipientTypeDetail=$Member.RecipientTypeDetails
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$MemberEmail=$Member.PrimarySMTPAddress
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$MemberName=$Member.DisplayName
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if($MemberEmail -eq "")
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{
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$MemberEmail="-"
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}
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#Get Counts by RecipientTypeDetail
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foreach($key in [object[]]$Recipienthash.Keys)
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{
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if(($RecipientTypeDetail -eq $key) -eq "true")
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{
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[int]$RecipientHash[$key]+=1
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}
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}
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Print_Output
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}
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}
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#Print Summary report
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if($Print -eq 1)
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{
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#Order RecipientTypeDetail based on count
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$Hash=@{}
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$Hash=$RecipientHash.GetEnumerator() | Sort-Object -Property value -Descending |foreach{
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if([int]$($_.Value) -gt 0 )
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{
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if($Recipient -ne "")
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{ $Recipient+=";"}
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$Recipient+=@("$($_.Key) - $($_.Value)")
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}
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if($Recipient -eq "")
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{$Recipient="-"}
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}
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$Result=@{'DisplayName'=$DisplayName;'PrimarySmtpAddress'=$EmailAddress;'Alias'=$Alias;'GroupType'=$GroupType;'Manager'=$Manager;'GroupMembersCount'=$MembersCount;'MembersCountByType'=$Recipient;'AuthorizedSenders'=$AuthorizedSenders;'ExternalSendersBlocked'=$ExternalSendersAllowed;'HiddenFromAddressList'=$_.HiddenFromAddressListsEnabled;
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'Description'=$_.Description;'CreationTime'=$_.WhenCreated;'DirSyncEnabled'=$_.IsDirSynced;'JoinGroupWithoutApproval'=$_.MemberJoinRestriction;'LeaveGroupWithoutApproval'=$_.MemberDepartRestriction} #Uncomment to print additional attributes in output
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$Results= New-Object PSObject -Property $Result
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$Results | Select-Object DisplayName,PrimarySmtpAddress,Alias,GroupType,Manager,GroupMembersCount,AuthorizedSenders,ExternalSendersBlocked,MembersCountByType,HiddenFromAddressList,Description,CreationTime,DirSyncEnabled,JoinGroupWithoutApproval,LeaveGroupWithoutApproval | Export-Csv -Path $ExportSummaryCSV -Notype -Append
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}
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}
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#Print Detailed Output
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Function Print_Output
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{
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if($Print -eq 1)
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{
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$Result=@{'DisplayName'=$DisplayName;'PrimarySmtpAddress'=$EmailAddress;'Alias'=$Alias;'Members'=$MemberName;'MemberEmail'=$MemberEmail;'MemberType'=$RecipientTypeDetail}
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$Results= New-Object PSObject -Property $Result
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$Results | Select-Object DisplayName,PrimarySmtpAddress,Alias,Members,MemberEmail,MemberType | Export-Csv -Path $ExportCSV -Notype -Append
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}
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}
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Function main()
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{
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#Check for EXO module inatallation
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$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($Confirm -match "[yY]")
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{
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Write-host "Installing Exchange Online PowerShell module"
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Install-Module ExchangeOnlineManagement -Repository PSGallery -AllowClobber -Force
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}
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else
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{
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Write-Host EXO module is required to connect Exchange Online.Please install module using Install-Module ExchangeOnlineManagement cmdlet.
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Exit
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}
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}
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Write-Host Connecting to Exchange Online...
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#Storing credential in script for scheduling purpose/ Passing credential as parameter - Authentication using non-MFA account
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if(($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 $Credential -ShowBanner:$false
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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 -ShowBanner:$false
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}
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#Set output file
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$ExportCSV=".\DistributionGroup-MembershipReport_$((Get-Date -format yyyy-MMM-dd-ddd` hh-mm` tt).ToString()).csv" #Detailed report
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$ExportSummaryCSV=".\DistributionGroup-Report_$((Get-Date -format yyyy-MMM-dd-ddd` hh-mm` tt).ToString()).csv" #Summary report
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#Get a list of RecipientTypeDetail
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$RecipientTypeArray=Get-Content -Path .\RecipientTypeDetails.txt -ErrorAction Stop
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$Result=""
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$Results=@()
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$ManagerHash = @{}
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#Check for input file
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if([string]$GroupNamesFile -ne "")
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{
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#We have an input file, read it into memory
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$DG=@()
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$DG=Import-Csv -Header "DisplayName" $GroupNamesFile
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foreach($item in $DG)
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{
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Get-DistributionGroup -Identity $item.displayname | Foreach{
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$Print=1
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Get_Members}
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$Count++
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}
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}
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else
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{
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#Get all distribution group
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Get-DistributionGroup -ResultSize Unlimited | Foreach{
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$Print=1
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Get_Members
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$Count++}
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}
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#Open output file after execution
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Write-Host `nScript executed successfully
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if((Test-Path -Path $ExportCSV) -eq "True")
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{
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Write-Host `n" Detailed report available in:" -NoNewline -ForegroundColor Yellow
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Write-Host $ExportCSV `n
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Write-host " Summary report available in:" -NoNewline -ForegroundColor Yellow
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Write-Host $ExportSummaryCSV
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Write-Host `n~~ Script prepared by AdminDroid Community ~~`n -ForegroundColor Green
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Write-Host "~~ Check out " -NoNewline -ForegroundColor Green; Write-Host "admindroid.com" -ForegroundColor Yellow -NoNewline; Write-Host " to get access to 1800+ Microsoft 365 reports. ~~" -ForegroundColor Green `n`n
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$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 "$ExportCSV"
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Invoke-Item "$ExportSummaryCSV"
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}
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}
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Else
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{
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Write-Host No DistributionGroup found
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}
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#Disconnect Exchange Online session
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Disconnect-ExchangeOnline -Confirm:$false -InformationAction Ignore -ErrorAction SilentlyContinue
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}
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. main
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