NAT in Fortigate

What's the effect of turning on / off NAT in the Fortigate Policy ?

If NAT is on with "Use Outgoing Interface Address" , which IP address will be used for translation ? Will it translate original source or destination IP address in the packet ?

Thx.
FortigateNat.png
AXISHKAsked:
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Jakob DigranesSenior ConsultantCommented:
it will use the public IP address of the WAN interface. If you want to use another address - add mapping under IP POOLS under Firewall and Policy
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AXISHKAuthor Commented:
Will source or destination in the packet be translated ?
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Jakob DigranesSenior ConsultantCommented:
source
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