Applies to: Exchange Online, Exchange Server 2016

This cmdlet is available in on-premises Exchange Server 2016 and in the cloud-based service. Some parameters and settings may be exclusive to one environment or the other.

Use the Get-PublicFolderMailboxDiagnostics cmdlet to view event-level information about a public folder mailbox. This information can be used to troubleshoot public folder issues.

For information about the parameter sets in the Syntax section below, see Syntax.

Get-PublicFolderMailboxDiagnostics -Identity <MailboxIdParameter> [-Confirm [<SwitchParameter>]] [-DomainController <Fqdn>] [-IncludeDumpsterInfo <SwitchParameter>] [-IncludeHierarchyInfo <SwitchParameter>] [-WhatIf [<SwitchParameter>]]

This example returns the diagnostic information for the public folder mailbox Customer Escalations.

Get-PublicFolderMailboxDiagnostics -Identity "Customer Escalations"

This example returns the diagnostic information for the public folder mailbox Sales Forecasts and exports the report to a CSV file.

Get-PublicFolderMailboxDiagnostics -Identity "Sales Forecasts" | Export-CSV C:\Diagnostics\SalesForecasts.csv

You need to be assigned permissions before you can run this cmdlet. Although all parameters for this cmdlet are listed in this topic, you may not have access to some parameters if they're not included in the permissions assigned to you. To see what permissions you need, see the "Public folders" entry in the Sharing and collaboration permissions topic.


Parameter Required Type Description




The Identity parameter specifies the identity of the public folder mailbox. The public folder mailbox is where the content of the public folder resides.




The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.

  • Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax: -Confirm:$false.

  • Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you acknowledge the command before proceeding.




This parameter is available only in on-premises Exchange 2016.

The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name (FQDN). For example,




The IncludeDumpsterInfo parameter specifies that diagnostic information for the \NON_IPM_TREE\DUMPSTER_ROOT folder, which serves as the dumpster for public folder mailboxes, is included in the returned information.




The IncludeHierarchyInfo switch specifies whether to include folder hierarchy information in the results. This includes the following information:

  • TotalFolderCount   The total number of public folders in the specified public folder mailbox.

  • MaxFolderChildCount   The largest number of child folders in the public folder hierarchy.

  • HierarchyDepth   The depth of the public folder hierarchy. The root folder is 0.

  • CalendarFolderCount   The number of calendar public folders.

  • ContactFolderCount   The number of calendar public folders.

  • MailPublicFolderCount   The number of mail-enabled public folders.

  • NoteFolderCount   The number of note public folders.

  • StickyNoteFolderCount   The number of sticky note public folders.

  • TaskFolderCount   The number of task public folders.

  • OtherFolderCount   The number of public folders that don't match any of the previously defined public folder types.




The WhatIf switch simulates the actions of the command. You can use this switch to view the changes that would occur without actually applying those changes. You don't need to specify a value with this switch.

To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types. If the Input Type field for a cmdlet is blank, the cmdlet doesn’t accept input data.

To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types. If the Output Type field is blank, the cmdlet doesn’t return data.