Problem
You are unable to remotly manage a server using server administrator getiing a DCOM and Remote Event Management firewall error.
Cause
The firewall on the remote computer is not configured to allow remote management of the server.
Solution
You can run this PowerShell command to enable the rules on all servers in one command.
Import-Module NetSecurity
Invoke-Command Server1,Server2,Server3 {Get-NetFireWallRule *COM* | Enable-NetFirewallRule}
Invoke-Command Server1,Server2,Server3 {Get-NetFireWallRule *RemoteEvent* | Enable-NetFirewallRule}?