[OpenSIPS-Users] How to modify username of FROM uri?

[CheeWii]

Hi
I have a simple question.
I know the from_uri can get the FROM information. and  I can use
uac_replace_from() to change uri.
But I just want to modify the domain only , the username need to be
reserved.
Thus
From: "123" <sip:123 at 192.168.0.1 <sip%3A123 at 192.168.0.1>>;----->From: "123"
<sip:123 at 10.200.0.5 <sip%3A123 at 10.200.0.5>>

How can I accomplish it simply? Thanks a lot:)
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