The important files in InterForm400 are the files that are normally included in the journal, but you could simply mirror all objects in library APF3812. Remember that if you are using journaling for this, the journaling MUST use IMAGES(*BOTH) (parameter on the STRJRNPF and STJRNOBJ commands). This is necessary because InterForm400 is using the journal to roll back changes if necessary.
In older versions of InterForm400, we emphasized that it was important NOT to mirror the data area: APF3812/APFCONFIG, as it contains the license code and it must be different on the two machines, but with the 2008 and newer versions of InterForm400, you can now maintain up to 4 license codes via the same license screen. You now insert both license codes in the same screen, and let the mirroring copy the changes onto the other machine. So now you should even mirror this object (the data area APF3812/APFCONFIG) as well!
You should also mirror the directories /apf3812home and /apf3812mail and subdirectories EXCEPT:
/apf3812home/temp, apf3812home/log, /apf3812mail/www/if400mailw/logs and /apf3812mail/PDFtemp.
These temp directories contains temporary work files and slow mirroring of these temp directories can actually cause a problem in InterForm400.
If you use the InterForm400 email web interface, then you also need to mirror the member, IF400MAILW in the file QUSRSYS/QATMHINSTC.
