Interchange at 5.2 had no option to export partners, either from the UI, or by a command line tool. We want to start "afresh" at a newer version from an old environment with hundreds of partners, what is the best practice to get those partner profiles out of the old system?

For this export of the 5.2 profiles, Axway added the exportProfiles command line tool with an -all switch at version 5.4. Upgrade the db to the 5.4 schema and run the exportProfiles.sh -all utiltiy to get those exported partner profiles (in .xml format). Use the auto-import partner directory at the new version.