I am currently attempting to migrate users on JSS 9.3 - all my users and user groups for device assignments, etc come from LDAP. The process appears to hang. I'm 15+ minutes in and I haven't seen any indicated progress.
I go to the Users tab, then Migrate Users. The process begins, with an empty progress bar under "Loading Computer and Mobile Device Data" ... nothing happens after that.
I have ~800 Macs and ~190 mobile devices bound to the JSS. I am and admin user with full access. I have no privileges unset.
For people who've done a user migration: how long has it taken? Did anything appear to hang for a while - but it eventually completed?