@ -273,7 +273,11 @@ class Manager extends PublicEmitter {
if ($backend->implementsActions(\OC_USER_BACKEND_COUNT_USERS)) {
$backendusers = $backend->countUsers();
if($backendusers !== false) {
$userCountStatistics[get_class($backend)] = $backendusers;
if(isset($userCountStatistics[get_class($backend)])) {
$userCountStatistics[get_class($backend)] += $backendusers;
} else {
}