Commands › Exchange Online

New-MailboxFolder

Exchange Online ExchangeOnlineManagement New-*

Create folders in your own mailbox. Administrators can't use this cmdlet to create folders in other mailboxes (the cmdlet is available only from the MyBaseOptions user role).

Quick start script

# New-MailboxFolder — quick start (serv365.ai)
# 1. Connect (app-only shown; interactive: omit the certificate parameters)
Connect-ExchangeOnline -CertificateThumbprint $thumb -AppId $appId -Organization $org

# 2. Capture the current state first — you cannot roll back what you never recorded
$before = Get-MailboxFolder
$before | Format-List

# 3. Make the change (dry run first)
New-MailboxFolder -Name <String> -Parent <MailboxFolderIdParameter> -WhatIf
New-MailboxFolder -Name <String> -Parent <MailboxFolderIdParameter>

# 4. Verify and diff
$after = Get-MailboxFolder
Compare-Object ($before | Out-String) ($after | Out-String)

Syntax

New-MailboxFolder [-Name] <String> -Parent <MailboxFolderIdParameter>
 [-Confirm]
 [-DomainController <Fqdn>]
 [-WhatIf]
 [<CommonParameters>]

Parameters (5)

Parameter	Type	Required	What it controls
-Name	String	yes	The Name parameter specifies the name of the new folder. If the value contains spaces, enclose the value in quotation marks (").
-Parent	MailboxFolderIdParameter	yes	The Parent parameter specifies where to create the new mailbox folder. The syntax is `[MailboxID]:\[ParentFolder][\SubFolder]`.
-Confirm	SwitchParameter		The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on whether the cmdlet requires confirmation before proceeding.
-DomainController	Fqdn		This parameter is functional only in on-premises Exchange.
-WhatIf	SwitchParameter		The WhatIf switch shows what the command does without making any changes. You don't need to specify a value with this switch.

Reference facts derived from Microsoft documentation, © Microsoft, licensed CC BY 4.0; restructured with original guidance by serv365.ai.