I recive this error when running the preparing AD for exchange 2013 on a 2012 r2 server. 

Error:

The following error was generated when "$error.Clear();

          #

          # O15# 2844081 - Create PartnerApplication "Exchange Online" in DC and On-Premise

          #

          $exch = [Microsoft.Exchange.Data.Directory.SystemConfiguration.WellknownPartnerApplicationIdentifiers]::Exchange;

          $exchApp = Get-PartnerApplication $exch -ErrorAction SilentlyContinue -DomainController $RoleDomainController | Where { $_.UseAuthServer };

          if ($exchApp -eq $null)

          {

              $exchAppName = "Exchange Online";

              $exchApp = New-PartnerApplication -Name $exchAppName -ApplicationIdentifier $exch -Enabled $RoleIsDatacenter -AcceptSecurityIdentifierInformation $false -DomainController $RoleDomainController;

          }

          # Create application account for Exchange

          $appAccountName = $exchApp.Name + "-ApplicationAccount";

          $appAccount = Get-LinkedUser -Identity $appAccountName -ErrorAction SilentlyContinue -DomainController $RoleDomainController;

          if ($appAccount -eq $null)

          {

            $appAccountUpn = $appAccountName.Replace(" ", "_") + "@" + $RoleFullyQualifiedDomainName;

            $appAccount = New-LinkedUser -Name $appAccountName -UserPrincipalName $appAccountUpn -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "UserApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "ArchiveApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "LegalHoldApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "Mailbox Search" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "TeamMailboxLifecycleApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "MailboxSearchApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            Set-PartnerApplication -Identity $exchApp.Identity -LinkedAccount $appAccount.Identity -DomainController $RoleDomainController;;

          }

        " was run: "Couldn't find a user with the identity "ESL.LOC/Users/Exchange Online-ApplicationAccount".".

Error:

The following error was generated when "$error.Clear();

          #

          # O15# 2844081 - Create PartnerApplication "Exchange Online" in DC and On-Premise

          #

          $exch = [Microsoft.Exchange.Data.Directory.SystemConfiguration.WellknownPartnerApplicationIdentifiers]::Exchange;

          $exchApp = Get-PartnerApplication $exch -ErrorAction SilentlyContinue -DomainController $RoleDomainController | Where { $_.UseAuthServer };

          if ($exchApp -eq $null)

          {

              $exchAppName = "Exchange Online";

              $exchApp = New-PartnerApplication -Name $exchAppName -ApplicationIdentifier $exch -Enabled $RoleIsDatacenter -AcceptSecurityIdentifierInformation $false -DomainController $RoleDomainController;

          }

          # Create application account for Exchange

          $appAccountName = $exchApp.Name + "-ApplicationAccount";

          $appAccount = Get-LinkedUser -Identity $appAccountName -ErrorAction SilentlyContinue -DomainController $RoleDomainController;

          if ($appAccount -eq $null)

          {

            $appAccountUpn = $appAccountName.Replace(" ", "_") + "@" + $RoleFullyQualifiedDomainName;

            $appAccount = New-LinkedUser -Name $appAccountName -UserPrincipalName $appAccountUpn -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "UserApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "ArchiveApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "LegalHoldApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "Mailbox Search" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "TeamMailboxLifecycleApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            New-ManagementRoleAssignment -Role "MailboxSearchApplication" -User $appAccount.Identity -DomainController $RoleDomainController;

            Set-PartnerApplication -Identity $exchApp.Identity -LinkedAccount $appAccount.Identity -DomainController $RoleDomainController;;

          }

        " was run: "Couldn't find a user with the identity "ESL.LOC/Users/Exchange Online-ApplicationAccount".".

When you run the Setup.exe / PS / IAcceptExchangeServerLicenseTerms command to prepare the scheme did not receive any error? 
The account under which you run the command is a member of admins schema, Domain Admin? 

Regards

Hi,

Fist, please check if there is an account which is Exchange Online-ApplicationAccount via ADUC.

By default, this account is disabled, please enable it and re-run Setup /PrepareAD again. It should success. After preparing AD schema, please disable the account again.

Best regards,
Belinda

Thank you very much.

stop the internet connection wile you are running setup (just for this error)

For virtual machines just remove default gateway IP if you are connected with Remote Desktop

• Edited by Arianit Berisha 21 hours 55 minutes ago

stop the internet connection wile you are running setup (just for this error)

For virtual machines just remove default gateway IP if you are connected with Remote Desktop

• Edited by Arianit Berisha Friday, March 27, 2015 9:31 AM