pls use below qualifiers and insert according to your use in the x12 edi document
01-for DUNS and set it in ISA05 (SenderQualifier) and ISA07 (ReceiverQualifier)
ZZ-for MutuallyDefined and follow the same above procedure.
ISA06 (SenderID) and ISA08(ReceiverID) will be the communication ids.
GS02 and GS03 also does the same depends on companies usage these field values can be same as ISA06 and ISA08 or may varies.
HTH.
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