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Create GetSharedMailboxPermissions.ps1
Export Shared Mailbox Permission report
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AdminDroid
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#Accept input paramenters
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param(
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[switch]$FullAccess,
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[switch]$SendAs,
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[switch]$SendOnBehalf,
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[string]$MBNamesFile,
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[string]$UserName,
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[string]$Password,
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[switch]$MFA
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)
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function Print_Output
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{
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#Print Output
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if($Print -eq 1)
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{
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$Result = @{'Display Name'=$_.Displayname;'User PrinciPal Name'=$upn;'Primary SMTP Address'=$PrimarySMTPAddress;'Access Type'=$AccessType;'User With Access'=$userwithAccess;'Email Aliases'=$EmailAlias}
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$Results = New-Object PSObject -Property $Result
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$Results |select-object 'Display Name','User PrinciPal Name','Primary SMTP Address','Access Type','User With Access','Email Aliases' | Export-Csv -Path $ExportCSV -Notype -Append
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}
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}
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#Getting Mailbox permission
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function Get_MBPermission
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{
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$upn=$_.UserPrincipalName
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$DisplayName=$_.Displayname
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$MBType=$_.RecipientTypeDetails
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$PrimarySMTPAddress=$_.PrimarySMTPAddress
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$EmailAddresses=$_.EmailAddresses
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$EmailAlias=""
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foreach($EmailAddress in $EmailAddresses)
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{
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if($EmailAddress -clike "smtp:*")
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{
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if($EmailAlias -ne "")
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{
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$EmailAlias=$EmailAlias+","
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}
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$EmailAlias=$EmailAlias+($EmailAddress -Split ":" | Select-Object -Last 1 )
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}
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}
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$Print=0
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Write-Progress -Activity "`n Processed mailbox count: $SharedMBCount "`n" Currently Processing: $DisplayName"
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#Getting delegated Fullaccess permission for mailbox
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if(($FilterPresent -ne $true) -or ($FullAccess.IsPresent))
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{
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$FullAccessPermissions=(Get-MailboxPermission -Identity $upn | where { ($_.AccessRights -contains "FullAccess") -and ($_.IsInherited -eq $false) -and -not ($_.User -match "NT AUTHORITY" -or $_.User -match "S-1-5-21") }).User
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if([string]$FullAccessPermissions -ne "")
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{
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$Print=1
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$UserWithAccess=""
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$AccessType="FullAccess"
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foreach($FullAccessPermission in $FullAccessPermissions)
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{
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if($UserWithAccess -ne "")
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{
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$UserWithAccess=$UserWithAccess+","
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}
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$UserWithAccess=$UserWithAccess+$FullAccessPermission
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}
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Print_Output
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}
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}
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#Getting delegated SendAs permission for mailbox
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if(($FilterPresent -ne $true) -or ($SendAs.IsPresent))
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{
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$SendAsPermissions=(Get-RecipientPermission -Identity $upn | where{ -not (($_.Trustee -match "NT AUTHORITY") -or ($_.Trustee -match "S-1-5-21"))}).Trustee
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if([string]$SendAsPermissions -ne "")
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{
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$Print=1
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$UserWithAccess=""
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$AccessType="SendAs"
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foreach($SendAsPermission in $SendAsPermissions)
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{
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if($UserWithAccess -ne "")
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{
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$UserWithAccess=$UserWithAccess+","
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}
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$UserWithAccess=$UserWithAccess+$SendAsPermission
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}
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Print_Output
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}
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}
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#Getting delegated SendOnBehalf permission for mailbox
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if(($FilterPresent -ne $true) -or ($SendOnBehalf.IsPresent))
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{
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$SendOnBehalfPermissions=$_.GrantSendOnBehalfTo
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if([string]$SendOnBehalfPermissions -ne "")
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{
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$Print=1
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$UserWithAccess=""
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$AccessType="SendOnBehalf"
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foreach($SendOnBehalfPermissionDN in $SendOnBehalfPermissions)
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{
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if($UserWithAccess -ne "")
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{
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$UserWithAccess=$UserWithAccess+","
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}
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#$SendOnBehalfPermission=(Get-Mailbox -Identity $SendOnBehalfPermissionDN).UserPrincipalName
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$UserWithAccess=$UserWithAccess+$SendOnBehalfPermissionDN
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}
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Print_Output
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}
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}
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}
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function main{
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#Connect AzureAD and Exchange Online from PowerShell
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Get-PSSession | Remove-PSSession
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#Authentication using MFA
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if($MFA.IsPresent)
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{
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$MFAExchangeModule = ((Get-ChildItem -Path $($env:LOCALAPPDATA+"\Apps\2.0\") -Filter CreateExoPSSession.ps1 -Recurse ).FullName | Select-Object -Last 1)
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If ($MFAExchangeModule -eq $null)
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{
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Write-Host `nPlease install Exchange Online MFA Module. -ForegroundColor yellow
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Write-Host You can install module using below blog :https://o365reports.com/2019/04/17/connect-exchange-online-using-mfa/ `n `nOR you can install module directly by entering "Y"`n
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$Confirm= Read-Host Are you sure you want to install module directly? [Y] Yes [N] No
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if($Confirm -match "[y]")
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{
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Write-Host Yes
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Start-Process "iexplore.exe" "https://cmdletpswmodule.blob.core.windows.net/exopsmodule/Microsoft.Online.CSE.PSModule.Client.application"
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}
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else
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{
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Start-Process 'https://o365reports.com/2019/04/17/connect-exchange-online-using-mfa/'
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Exit
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}
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$Confirmation= Read-Host Have you installed Exchange Online MFA Module? [Y] Yes [N] No
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if($Confirmation -match "[y]")
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{
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$MFAExchangeModule = ((Get-ChildItem -Path $($env:LOCALAPPDATA+"\Apps\2.0\") -Filter CreateExoPSSession.ps1 -Recurse ).FullName | Select-Object -Last 1)
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If ($MFAExchangeModule -eq $null)
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{
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Write-Host Exchange Online MFA module is not available -ForegroundColor red
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Exit
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}
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}
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else
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{
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Write-Host Exchange Online PowerShell Module is required
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Start-Process 'https://o365reports.com/2019/04/17/connect-exchange-online-using-mfa/'
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Exit
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}
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}
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#Importing Exchange MFA Module
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. "$MFAExchangeModule"
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Connect-EXOPSSession -WarningAction SilentlyContinue
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Write-Host `nReport generation in progress...
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}
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#Authentication using non-MFA
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else
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{
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#Storing credential in script for scheduling purpose/ Passing credential as parameter
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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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}
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else
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{
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$Credential=Get-Credential -Credential $null
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}
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$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $Credential -Authentication Basic -AllowRedirection
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Import-PSSession $Session -CommandName Get-Mailbox,Get-MailboxPermission,Get-RecipientPermission -FormatTypeName * -AllowClobber | Out-Null
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}
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#Set output file
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$ExportCSV=".\SharedMBPermissionReport_$((Get-Date -format yyyy-MMM-dd-ddd` hh-mm` tt).ToString()).csv"
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$Result=""
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$Results=@()
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$SharedMBCount=0
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$RolesAssigned=""
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#Check for AccessType filter
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if(($FullAccess.IsPresent) -or ($SendAs.IsPresent) -or ($SendOnBehalf.IsPresent))
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{
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$FilterPresent=$true
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}
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#Check for input file
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if ($MBNamesFile -ne "")
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{
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#We have an input file, read it into memory
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$MBs=@()
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$MBs=Import-Csv -Header "DisplayName" $MBNamesFile
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foreach($item in $MBs)
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{
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Get-Mailbox -Identity $item.displayname | Foreach{
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if($_.RecipientTypeDetails -ne 'SharedMailbox')
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{
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Write-Host $_.UserPrincipalName is not a shared mailbox -ForegroundColor Red
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continue
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}
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$SharedMBCount++
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Get_MBPermission
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}
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}
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}
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#Getting all User mailbox
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else
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{
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Get-mailbox -RecipientTypeDetails Shared -ResultSize Unlimited | foreach{
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$SharedMBCount++
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Get_MBPermission}
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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 "Detailed report available in: $ExportCSV" -ForegroundColor Green
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$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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}
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}
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Else
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{
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Write-Host No shared mailbox found that matches your criteria.
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}
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#Clean up session
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Get-PSSession | Remove-PSSession
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}
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. main
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