This screen
defines the ISA or outer envelope. The Partners EDI ID is the
send address of the partner. The qualifiers tell us what
the ID is. In our example ZZ means mutually defined between
the partners.
The user ID is the sender on the ISA envelope. The security for send and
receive is also defined on this screen with their qualifiers.
The test/prod switch allows for a test environment between
you
and your partner.