You need a union set between a query with Table 1 left-joined to Table 2 and a query with Table 1 right-joined to Table 2.
You might try something like the following:
SELECT [Table 1].RMName, [Table 1].AUM, [Table 1].AUA,
Nz([Table 2].NNA, 0) AS NNA, Nz([Table 2].REV, 0) AS REV
FROM...