Hi,
"Use Forward Settings of Line Group Member" would come in the picture in below scenario.
Phone A ---> Phone B ( has call forward all to hunt pilot number ) -----> hunt pilot number
In the above scenario , if no one picked up the call from the hunt members , CUCM will forward the call to the number mentioned in the Forward No Coverage filed in the directory number configuration window of phone B.
"Use Forward Settings of Line Group Member" replaces "Use Personal Preferences" (you can see the same in help this page on your CUCM.)
"Use Forward Settings of Line Group Member" is not intended to check the forwarding settings of the line group members. In fact those settings are completely ignored when CCM does Hunting. See below an extract from the System Manager guide for CUCM 10.0:
Hunting and Call Forwarding
The concept of hunting differs from that of call forwarding. Hunting allows Cisco Unified Communications Manager to extend a call to one or more lists of numbers, where each such list can specify a hunting order that is chosen from a fixed set of algorithms. When a call extends to a hunt party from these lists and the party fails to answer or is busy, hunting resumes with the next hunt party. (The next hunt party varies depending on the current hunt algorithm.) Hunting thus ignores the Call Forward No Answer (CFNA), Call Forward Busy (CFB), or Call Forward All (CFA) settings for the attempted party.
Call forwarding allows detailed control as to how to extend (divert and redirect represent equivalent terms for extend) a call when a called party fails to answer or is busy and hunting is not taking place. For example, if the CFNA setting for a line is set to a hunt-pilot number, a call to that line that is not answered diverts to the hunt-pilot number and thus begins hunting.
Cisco Unified Communications Manager offers the ability to redirect a call when hunting fails (that is, when hunting terminates without any hunt party answering, due either to exhausting the list of hunt numbers or to timing out). If used, this final redirection comprises a Call Forwarding action. Therefore, the Hunt Pilot Configuration window includes Call Forwarding configuration concepts that are similar to those found on the Directory Number Configuration window.
Check the link below which explains the same Personal Preferences section.
Personal Preferences
Hunting supports the capability to provide a final forwarding treatment to voice-messaging system, a specific dialed number, or some personal treatment (based on the original called party) when hunting either exhausts or times out. The capability to provide separate final forwarding treatment based on whether the call was internal or external also exists. Hunting supports a separate, configurable maximum hunt timer for each hunt-pilot number.
In the Hunt Pilot configuration settings, Use Personal Preferences, Destination fields are available to enable the Call Forward No Coverage (CFNC) settings for the original called number that forwarded the call to the hunt pilot.
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmsys/CUCM_BK_SE5FCFB6_00_cucm-system-guide-100/CUCM_BK_SE5FCFB6_00_cucm-system-guide-100_chapter_010000.html#CUCM_RF_H945D417_00
(Rate if it helps)
JB
