Exchange 2013 Setup Error: A Receive connector must have a unique combination of a local IP address & port bindings and remote IP address ranges

You may get an error while Exchange setup checks Receive Connectors for local IP address/port bindings and remote IP address ranges for the server where you are installing Cumulative Update. This error would come up at “Mailbox Role: Transport Service” step of setup/update process. Here is the detailed error message.

Error:

Error:
The following error was generated when “$error.Clear();
$connectors = Get-ReceiveConnector -Server $RoleFqdnOrName;
foreach($connector in $connectors) { if($connector.MaxLocalHopCount -gt 1) { Set-ReceiveConnector -Identity $connector.Identity -MaxLocalHopCount 5 } };
” was run: “Microsoft.Exchange.Management.SystemConfigurationTasks.ConnectorMappingConflictException: The values that you specified for the Bindings and RemoteIPRanges parameters conflict with the settings on Receive connector “EX2013\Incoming from Internet – Dummy”. A Receive connector must have a unique combination of a local IP address & port bindings and remote IP address ranges. Change at least one of these values.
at Microsoft.Exchange.Configuration.Tasks.Task.ThrowError(Exception exception, ErrorCategory errorCategory, Object target, String helpUrl)
at Microsoft.Exchange.Configuration.Tasks.Task.WriteError(Exception exception, ErrorCategory category, Object target)
at Microsoft.Exchange.Management.SystemConfigurationTasks.SetReceiveConnector.InternalValidate()
at Microsoft.Exchange.Configuration.Tasks.Task.<ProcessRecord>b__b()
at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)”.
 
Error:
The following error was generated when “$error.Clear();
$connectors = Get-ReceiveConnector -Server $RoleFqdnOrName;
foreach($connector in $connectors) { if($connector.MaxLocalHopCount -gt 1) { Set-ReceiveConnector -Identity $connector.Identity -MaxLocalHopCount 5 } };
” was run: “Microsoft.Exchange.Management.SystemConfigurationTasks.ConnectorMappingConflictException: The values that you specified for the Bindings and RemoteIPRanges parameters conflict with the settings on Receive connector “EX2013\Default Frontend EX2013”. A Receive connector must have a unique combination of a local IP address & port bindings and remote IP address ranges. Change at least one of these values.
at Microsoft.Exchange.Configuration.Tasks.Task.ThrowError(Exception exception, ErrorCategory errorCategory, Object target, String helpUrl)
at Microsoft.Exchange.Configuration.Tasks.Task.WriteError(Exception exception, ErrorCategory category, Object target)
at Microsoft.Exchange.Management.SystemConfigurationTasks.SetReceiveConnector.InternalValidate()
at Microsoft.Exchange.Configuration.Tasks.Task.<ProcessRecord>b__b()
at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)”.

Explanation:

You can not have same values of Local IP Address:Port bindings and Remote IP Address Range both on two Receive Connectors so essentially you have to change anyone of these on one of the Receive Connector.

Now problem is you won’t be able to open Exchange Admin Center (EAC) or Exchange Management Shell (EMS) to modify Local IP Address:Port Bindings or Remote IP Address Ranges on one of these receive connectors.

Solution:

Exchange saves configuration information in Configuration Partition of Active Directory so you can use any AD Editor like ADSIEdit.msc or ADExplorer.exe to modify this value. (Be careful while using these raw AD Editors!)

  • Open ADSIEDIT.MSC.
  • Navigate to the following location: CN=SMTP Receive Connectors,CN=Protocols,CN=<ExServerName>,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=<ExOrg Name>,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=<DomainName>,CN=Com
  • Right-click one of the Receive Connector which is showing up in error and then click Properties. (It is recommend to modify the Receive Connector created manually and not the “Default FrontendServerName” connector.)

Now change the value of either msExchSmtpReceiveRemoteIPRanges or msExchSmtpReceiveBindings following below setps.

  • Locate the msExchSmtpReceiveRemoteIPRanges attribute. This attribute stores values for Remote Network Settings that you see in EAC.
  • Remove the values here and add some unique IP address or IP Range back.

SMTPbindings

Source