I'm trying to set the default lookup entity in the form triggered by a multi-entity "Set Regarding" lookup field.
The javascript tweak set from the entity form is not enough for me, as most of the users work with the outlook integration of CRM. There is a "Set Regarding" option on any outlook email right click, which opens the CRM Lookup form.
I've done most of my customizations with javascript tweaks so far, but I can't find any "Lookup" form that I could directly work with. Is there any other way to customize these forms ?