You can try and hard code the number in /opt/zimbra/libexec/zmdailyreport:
Try changing:
my $user_limit = getLocalConfig('zimbra_mtareport_max_users') || 50;
my $host_limit = getLocalConfig('zimbra_mtareport_max_hosts') || 50;
$user_limit = 50 if $user_limit !~ /^\d+/;
$host_limit = 50 if $host_limit !~ /^\d+/;
To whatever number you want. These variables get passed to pflogsumm.pl as . NOTE: '0' = none.
Hope that helps.
Regards,
Moe
Release 7.2.2_GA_2852.RHEL6_64_20121204211952 RHEL6_64 NETWORK edition.