For Moodle

go into 'config.inc.php' and replace the line:

$max_advance_days = isset($cfg_mrbs->max_advance_days) ? $cfg_mrbs->max_advance_days : -1;

with is

if (is_siteadmin()) {
$max_advance_days = -1;
} else {
$max_advance_days = 2;
}
$cfg_mrbs->max_advance_days = $max_advance_days;


it allows site administrators to alter/add/delete any bookings outside of the max advance days setting