Commands › Exchange Online

Enable-UMService

Exchange Online ExchangeOnlineManagement Enable-*

Set the status of an Exchange Server 2010 Unified Messaging (UM) server to enabled. This setting enables the Unified Messaging server to process UM calls. You can run this cmdlet in Exchange 2013 or Exchange 2016, but the target server must be an Exchange 2010 UM server. You can't use this cmdlet to enable the UM service on Exchange 2013 or Exchange 2016 Mailbox servers.

Quick start script

# Enable-UMService — 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-UMService
$before | Format-List

# 3. Make the change (dry run first)
Enable-UMService -Identity <UMServerIdParameter> -WhatIf
Enable-UMService -Identity <UMServerIdParameter>

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

Syntax

Enable-UMService [-Identity] <UMServerIdParameter>
 [-Confirm]
 [-DomainController <Fqdn>]
 [-WhatIf]
 [<CommonParameters>]

Parameters (4)

Parameter	Type	Required	What it controls
-Identity	UMServerIdParameter	yes	The Identity parameter specifies the Exchange 2010 UM server that you want to enable. You can use any value that uniquely identifies the UM server. 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		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...
-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.