Event 10028 DCOM was unable to communicate with the computer

Event error 10028 may occur when ports between computers or servers are blocked. The description in your event log then shows:
Event 10028 DCOM was unable to communicate with the computer X using any of the configured protocols; requested by PID 1b18 (C:\WINDOWS\system32\ServerManager.exe).
Log Name: System
Source: Microsoft-Windows-DistributedCOM
Event ID: 10028
Level: Error

Event 10028 DCOM was unable to communicate with the computer

In my case, I was trying to manage some servers with Server Manager. These servers existed in another VLAN. But you may also encounter this error when

  • you have enabled the Windows Firewall, or
  • you have not enabled File and Printer sharing on the target machine
  • the computer is not in your network (anymore), but the DNS  record still exists

To solve this error:

  • try to disable the firewall on the target computer
  • enable File and Printer sharing on the target computer
  • remove the computer from Server Manager (if you don’t want to monitor)
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Iwan

remove the server from Server manager is the solutuion

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