Did you mean you created anonymous connectors for relay on the three exchange servers with the same name? For example, "Anonymous connector".
If it is the case, the actual names of the connectors would be specified by server names.
For example, if the server name is E16A, the connector's name would be "E16A\Anonymous connector".
And the command to add ip addresses to this connector would be:
Set-ReceiveConnector -Identity "E16A\Anonymous connector" -RemoteIPRanges 192.168.1.14 -Confirm:$false
If you run the following command, it would only modify the settings of the connector on the local server:
Set-ReceiveConnector -Identity "Anonymous connector" -RemoteIPRanges 192.168.1.14 -Confirm:$false
The other two servers' connector settings would remain unchanged.
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