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How to use ADC PT, NDC PT, and SCF PT parameters for MailStream Plus. How do you turn off 'offshore' entry points? Also, can you include and exclude specific ADC, NDC, and SCF entry points?

MailStream Plus™, all versions, all platforms
Position 8 of the ADC PT, NDC PT, and SCF PT parameter can be a Y to automatically generate ENT PT parameters for all of that type of entry facility, or with an N (the default) in position 8 you can enter individual ADC PTs, NDC PTs, or SCF PTs just for each entry point you want to enter the mail at.

The ADC PT, NDC PT, and SCF PT parameters all contain an option to not include offshore facilities, by putting an N in position 9.  The default is Y to include them.

NDC PT also has an option to include ASF entry points, by putting a Y in position 10.  The default is N to not include ASFs.

If you want to enter the mail at *almost all* of the ADCs, NDCs, or SCFs you could input individual ADC PT, NDC PT, or SCF PT parameters for each entry point that you want, with an N (or blank) in position 8 of each one.  
Or an alternative is to put a Y in position 8 of the ADC PT, NDC PT, or SCF PT parameter telling MailStream Plus™ to generate *all* of the entry points, but then use EP EXC parameter(s) to exclude the individual ones that you *don't* want to enter mail at. 
UPDATED:  May 16, 2019