1) Do you want the list of every possible combination of group a person with
group b person?

2) Or is it decided elsewhere which people from group b work with your group
a person?

You'd need more info then you've specified to do the second (i.e. something
that tells you which people work with which). To do the first, I'm not sure
the best way to do it in Excel, but it's easily done in Access/SQL:
SELECT table1.groupa, table2.groupb
FROM table1, table2;

If you can post more detail you may get more responses

"misstrious" wrote:

Apologies if this seems a simple question, but I am at a bit of a loss
on how to do it.

I have two lists of people with a many to many relationship Group A
work with number of people from Group B and the people from Group B
can work with multiple members of Group A.

How can I create a document using one list for Group A and Group B and
use functions, etc to combine them in both forms (to list all the
Group A people working with an individual Group B person and visa
versa).

Any help would be greatly appreciated.
.