Change field label when site is different

Change field label when site is different

Hi,
Is there anyone who can help maybe to create a script that will change a 'field_name' when site contains "something" ? I just wondering if it will work when I will put FAFR on load and execute script that will setText for example:

Field Name: GUDF_CHAR666
Field Label: Manage Engine

I want to change that to:

Field Name: GUDF_CHAR666
Field Label: Manage Engine 2
(just to change field label)

when in ticket site contains: "Microsoft"


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