not exactly sure what you need, but if its only collation issue you can do below
SELECT TOP 5 *
FROM [192.168.6.3].sync.dbo.agents_log
WHERE member_code COLLATE SQL_Latin1_General_CP1_CI_AS
IN (SELECT id
FROM members
WHERE NAME LIKE 'AOne Enterprises%')
I just added COLLATE SQL_Latin1_General_CP1_CI_AS , perhaps it work