So I followed the migration guide for 2.2 to 3.0, located here:
http://trac.zentyal.org/wiki/Documentation/Community/Migrate_2.2_to_3.0
But...I got a host of errors when trying to restore the users. Turns out, the User and Group modules made some changes between 3.0 and 3.2. Here is the version I was able to import 2.2 users with...