Commands › Exchange Online

Remove-MailUser

Exchange Online ExchangeOnlineManagement Remove-*

Remove existing mail users.

Quick start script

# Remove-MailUser — 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-MailUser
$before | Format-List

# 3. Make the change (dry run first)
Remove-MailUser -Identity <MailUserIdParameter> -WhatIf
Remove-MailUser -Identity <MailUserIdParameter>

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

Syntax

Remove-MailUser [-Identity] <MailUserIdParameter>
 [-Confirm]
 [-DomainController <Fqdn>]
 [-IgnoreDefaultScope]
 [-IgnoreLegalHold]
 [-PermanentlyDelete]
 [-WhatIf]
 [<CommonParameters>]

Parameters (7)

Parameter	Type	Required	What it controls
-Identity	MailUserIdParameter	yes	The Identity parameter specifies the mail user that you want to remove. You can use any value that uniquely identifies the mail user. For example:
-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 available only in on-premises Exchange.
-IgnoreDefaultScope	SwitchParameter		This parameter is available only in on-premises Exchange.
-IgnoreLegalHold	SwitchParameter		This parameter is available only in on-premises Exchange.
-PermanentlyDelete	SwitchParameter		This parameter is available only in the cloud-based service.
-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.