If you mean you have configured your deskphone/Jabber in the line group, then configured CFA on either device, and when a call comes from the hunt pilot you expect the CFA behavior, that will not work.
All call forward behaviors are ignored when the call arrives via a hunt pilot.
The only way to have other device ring at the same time, is to use SNR, and for that, you need to use outside destinations, you cannot use a DN registered to the same CUCM
When Call Comes from Hunt Group, Call Forward settings are ignored. You can add the Required local Extension in the Hunt Group and Enable Hunt Login Feature. So when you are on that desk just Press Login Button and you will start receiving calls on it.
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