Event 10028 DCOM was unable to communicate with the computer

Event error 10028 may occur when ports between computers or servers are blocked:

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

Solutions to 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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