You can follow this link to override LookupReference, it explains Lookup but in this same way you can use it to override your reference group field, you should register lookup field with your override lookup method.
And I think you can do it with CoC, did you try to create an extension class and override the lookupRefernece but it didn't work? please share with us your code.
Thanks,
Layan Jweihan
Martin Dráb230,445Most Valuable Professional
on at
Moved from D365 general forum to the Finance forum, because it seems to be about F&O and not about D365 in general. Please let me know if you disagree.
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