Commands › Exchange Online

Set-LinkedUser

Exchange Online ExchangeOnlineManagement Set-*

Modify the properties of an existing linked user account. The Outlook Live Directory Sync (OLSync) service account is a linked user.

Quick start script

# Set-LinkedUser — 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-LinkedUser
$before | Format-List

# 3. Make the change (dry run first)
Set-LinkedUser -Identity <UserIdParameter> -WhatIf
Set-LinkedUser -Identity <UserIdParameter>

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

Syntax

Set-LinkedUser [-Identity] <UserIdParameter>
 [-CertificateSubject <MultiValuedProperty>]
 [-Confirm]
 [-WhatIf]
 [<CommonParameters>]

Parameters (4)

Parameter	Type	Required	What it controls
-Identity	UserIdParameter	yes	The Identity parameter specifies the linked user. You can use any value that uniquely identifies the linked user, for example:
-CertificateSubject	MultiValuedProperty		The CertificateSubject parameter specifies the value of the subject field of the user's digital certificate. The syntax of the CertificateSubject value is `X509:<I>Issuer<S>Subject`. The values of Issuer and Subject...
-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.
-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.