Exchange 2013 install problem " The accepted domain mydomain.com already exists"

Hello,

I have a problem with exchange 2013 install.   I 've installed  windows 2012 r2 on the new IBM server . and I've configured AD, DNS . While I was installing exchange 2013. I am seeing error message  You can find error message below. .In order to this error message to solve. I 've tried   ADSIEdit method So. I changed mydomain.local  under shecma --> exchange--> services--> recepient --> mydomain.com  

Ps. There was a sbs 2003 server in the company. But this sbs server has been changed with new ibm server. I 've  added the all computers in the new domain.  Therefore The new domain name with old domain.name same .  There is  2 computers in the old domain on local area

The problem could be from the old domain

Error message : 

3] [1] [ERROR] The following error was generated when "$error.Clear(); 
          $acceptedDomains = @{};
          Get-AcceptedDomain | foreach {
              $domainName = $_.DomainName.ToString();
              if ($acceptedDomains.Contains($domainName)) {
                  Write-ExchangeSetupLog -Warning "Duplicate AcceptedDomain found.  '$($acceptedDomains[$domainName])' and '$($_.Name)' both reference domain '$domainName'";
              } else {
                  $acceptedDomains.Add($domainName, $_.Name);
              };
          };

          function getSmtpTemplates ([string]$property)
          {
              $input |
                  Select-Object -ExpandProperty $property |
                  Where-Object {$_.PrefixString -eq "SMTP"} |
                  Foreach-Object {$_.AddressTemplateString -replace ".*@", ""};
          }


          function addDomains ([Microsoft.Exchange.Data.Directory.SystemConfiguration.AcceptedDomainType]$domainType)
          {
              $domain = $null;
              $input |
                  Where-Object {-not $acceptedDomains.ContainsKey($_) -and -not $acceptedDomains.ContainsKey("*.$_")} |
                  Where-Object {[Microsoft.Exchange.Data.SmtpDomainWithSubdomains]::TryParse($_, [ref] $domain)} |
                  Foreach-Object {
                      
                      $name = $domain.ToString();

                      # Test to see if email address policy matches a recipient policy 
                      # with a wildcard domain before adding it
                      $needToAddDomain = $true;
                      While ($name.Contains(".")) {
                          $index = $name.IndexOf(".") + 1;
                          $name = $name.Substring($index);
                          if ($acceptedDomains.ContainsKey("*.$name")) {
                              $needToAddDomain = $false;
                              Break;
                          };
                      };

                      if ($needToAddDomain) {
                          $name = $domain.ToString();
                          if ($name.Length -gt 64) { $name = $name.Substring(0, 64) };
                          if ($acceptedDomains.ContainsValue($name) ) {$name = [System.Guid]::NewGuid().ToString()};

                          New-AcceptedDomain -Name:$name -DomainName:$domain -DomainType:$domainType;
                          $acceptedDomains[$domain.ToString()] = $name;
                      };
                  };
          }

          $emailAddressPolicies = Get-EmailAddressPolicy;
          $emailAddressPolicies | getSmtpTemplates "NonAuthoritativeDomains" | addDomains "InternalRelay";
          $emailAddressPolicies | getSmtpTemplates "EnabledEmailAddressTemplates" | addDomains "Authoritative";
        " was run: "The accepted domain mydomain.com already exists.".
[04.29.2014 18:07:39.0473] [1] [ERROR] The accepted domain celikiswire.com already exists.
[04.29.2014 18:07:39.0473] [1] [ERROR-REFERENCE] Id=CommonGlobalConfig___dcee6c5f86f24e85b5fe1e9cef0b175c Component=EXCHANGE14:\Current\Release\Shared\Datacenter\Setup
[04.29.2014 18:07:39.0473] [1] Setup is stopping now because of one or more critical errors.
[04.29.2014 18:07:39.0473] [1] Finished executing component tasks.
[04.29.2014 18:07:39.0488] [1] Ending processing Install-ExchangeOrganization
[04.29.2014 18:08:36.0194] [0] The registry key, HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ExchangeServer\V15\Setup, wasn't found.
[04.29.2014 18:08:36.0194] [0] CurrentResult setupbase.maincore:396: 0
[04.29.2014 18:08:36.0194] [0] End of Setup