Hi, when I'm (trying) to use userdb prefetch with ldap, it works fine for system users, but for virtual users without their own uid and gid, it won't work. I get in the log: Dec 31 01:34:47 buick dovecot: auth(default): prefetch(oddrun,127.0.0.1): userdb_uid not returned Dec 31 01:34:47 buick dovecot: auth(default): prefetch(oddrun,127.0.0.1): userdb_gid not returned Which means that the problem is that user_global_uid and user_global_gid is not used when using prefetch. That must be a bug? Best regards, Stian