Error: "The RPC server is unavailable"

Warning Failed to process DC: xxxxxxx.domain.local. The error is: Failed to connect to remote service control manager. Error details: The RPC server is unavailable.
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Symptoms You are getting the following warnings in summary reports:
  • "Warning Failed to process DC: xxxxxxx.domain.local. The error is: Failed to connect to remote service control manager. Error details: The RPC server is unavailable."
  • "Failed to open the event log. Error details: The RPC server is  unavailable" 
Cause

Common causes of RPC errors include:

  • Errors resolving a DNS or NetBIOS name.
  • The RPC service or related services may not be running.
  • Problems with network connectivity.
  • File and printer sharing is not enabled.
Resolution Review some typical issues and solutions for the "RPC server is unavailable" error:
  1. The remote computer may be blocked by the firewall.
Solution: Configure firewall properly.

NOTE. If you are using WIndows firewall, open the Group Policy Object Editor snap-in (gpedit.msc) to edit the Group Policy object (GPO) that is used to manage Windows Firewall settings in your organization.
Navigate to Computer Configuration - Administrative Templates - Network - Network Connections - Windows Firewall, and then open either Domain Profile or Standard Profile, depending on which profile you are using.
Enable the following exceptions: Allow Remote Administration Exception and Allow File and Printer Sharing Exception.
 
  1. Hostname or IP address is wrong or the remote computer is shutdown.
Solution: Make sure that hostname and IP address. are correct, make sure the machine is turned on and reachable. Also make sure FQDN name is resolved to correct IP address.
 
  1. The Windows Management Instrumentation service is not running on the remote computer.
Solution: Verify that the Windows Management Instrumentation service is running and set to auto start after restart.
 
  1. The TCP/IP NetBIOS Helper service is not running.
Solution: Verify that TCP/IP NetBIOS Helper service is running and set to auto start after restart.
 
  1. The Remote Procedure Call (RPC) service is not running on the remote computer.
Solution: Verify that Remote Procedure Call (RPC) service is running and set to auto start after restart.
 
To check that machine is reachable, perform the following steps:
  1. Log on the computer where Netwrix Auditor is installed using your data processing account.
  2. Go to Start --> Run and  type eventvwr and click OK.
  3. Right-click Event Viewer (Local) and select Connect To Another Computer.
  4. In the Select Computer dialog, type the name of the domain controller reporting the error in the Another Computer entry field. Click OK to connect to the domain controller. 
  5. Select Security log. The list should show you valid events.
For more information please use the following MS KB: social.technet.microsoft.com/wiki/contents/articles/4494.troubleshooting-the-rpc-server-is-unavailable.aspx
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