Second query - on my old 2.4.17 cyrus server I had these as the only quota entries in old imapd.conf, with quotas then set at user levels.
autocreatequota: 102400 quotawarn: 80
Is that still all I need to do on 3.0.7, along with manually setting overall quotas for users with sq?
In cyradm I set a quota, which appears to have worked OK
sq user/simon STORAGE 20971520
Do I need to do anything else to set and enforce quotas for users?