Plone - Migrating users between sites
Most research on this subject will point you in a tedious direction leading to python scripts, external methods and hours of wasted time. There are four simple steps:
- Export acl_users and portal_memberdata to your filesystem.
- If the new plone site is on a different server or instance, move the exported files to the import folder on the new plone instance.
- Import first acl_users to your new site, then continue to import portal_memberdata.
- If you have customized the join_form, personalize_form, or prefs_user_details, make sure you also copy those to the new plone site so the user metadata is available to them.

