I have a working formula
=JOIN(COLLECT({EMAIL}, {AGENCY}, Agency@row), CHAR(10))
This gives me all the emails for an agency in a single cell, with a return between each address.
I need to transfer the grouped emails to another sheet in a CONTACT COLUMN and have them recognised as contacts so that I can set a filter in Dynamic View based on that content.
Doing a VLOOKUP between the sheets only brings in the addresses; it does not have them recognised as contacts.
Any advice would be greatly appreciated.