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Active Directory operation failed… the object already exists” when installing Exchange Server

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Mô tả lỗi

Exchange server 2019 /PrepareAD or installing Cumulative Updates [ CUxx ] fail with the error,

while running Organization Preparation

Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataON /PrepareAD

The following error was generated when “$error.Clear();
install-AdministrativeGroup -DomainController $RoleDomainController

” was run: “Active Directory operation failed on Servername.domain.com. The object

‘CN=Folder Hierarchies, CN=Exchange Administrative Group (FYDIBOHF23SPDLT),

CN=Administrative Groups, CN=Exchange Organization,CN=Microsoft Exchange,

CN=Services,CN=Configuration, DC=Domain,DC=Com’ already exists.”

The Exchange Server setup operation didn’t complete. More details can be found in ExchangeSetup.log

located in the <SystemDrive>:\ExchangeSetupLogs folder. Exchange Server setup encountered an error.

Root Case

This error occur when the “CN= Public Folders” container underneath ‘CN=Folder Hierarchies has been

deleted from Active Directory. use the ADSI Edit, or a similar tool (LDP), to determine whether the Public

Folders container exists. The Public folder object can be found at:

CN=Configuration,CN=Services,CN=Microsoft Exchange,CN=Your Exchange Organization,

CN=Administrative Groups,CN=Administrative group,CN=Exchange Administrative Group

(FYDIBOHF23SPDLT), CN=Folder Hierarchies

Thủ tục xử lý

The workaround is to manually create a new msExchPFTree object in the Folder Hierarchy and set the msExchPFTreeType value to 1.  Here’s how to do that:

  • Run ADSIEdit.msc on a domain server with the AD Directory Services Tools (RSAT-ADDS) installed.  Your Exchange 2013 server should do fine.
  • Expand the following path:
    • Configuration [<domainController>.contoso.com]
    • CN=Configuration,DC=contoso,DC=com
    • CN=Services
    • CN=Microsoft Exchange
    • CN=<OrganizationName>
    • CN=Administrative Groups
    • CN=Exchange Administrative Group (FYDIBOHF23SPDLT)
    • CN=Folder Hierarchies
  • Right-click Folder Hierarchies and select New Object.
  • Select the msExchPFTree class object and click Next.
  • Enter any value for the cn (Common Name) value, such as PF.
  • Right-click the newly created msExchPFTree object and select Properties.
  • On the Attribute Editor tab, click msExchPFTreeType, and then click Edit.
  • In the Value box type 1, and then click OK two times.

Exit the ADSI Edit tool.

Source: https://learn.microsoft.com/en-us/archive/blogs/manjubn/1-exchange-server-2013-preparead-or-cumultive-update-installation-fails

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