How can a user change their password?

[anodos]

Or run a Samba based DC in a jail (weren't there plans for a plugin?). Then users can change their passwords from Windows or with smbpasswd.

You can change passwords through using the commandline middleware client midclt call user.query | jq to see your current users and get their "id". then midclt call user.update <id> '{"password": "MyPassword"}'