Tuesday, June 14, 2016

Server 2012 R2 Essentials clients offline in console

Step One: There is an Essentials server test tool made by Microsoft that you can use to determine what underlying issues you may have:


In my case everything passed on the initial tests but I was receiving the error on Ports “6602” and “8192”

I created an additional firewall rule to make sure those ports were open in and out.

The error persisted. I found that other services may be fighting for those ports so I ran the following command:

Set-NetNatTransitionConfiguration -IPv4AddressPortPool @(“serveripv4, 6001-6601”, “serveripv4, 6603-8911”, “serveripv4, 8913-47000”)

See example below with server IP “”:


I then reran the essentials server test tool and the ports were OK. I then restarted the Essentials 2012R2 Server and all clients started to come back online and backups began to run.

Reference: Fred Moore, Small Business Susan http://blogs.msmvps.com/bradley/2013/03/21/direct-access-and-essentials-go-around-the-port/

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