diff --git a/MEMORY.md b/MEMORY.md
index 43018fc..cf1c61c 100644
--- a/MEMORY.md
+++ b/MEMORY.md
@@ -267,3 +267,51 @@ Il test del pulsante "Test API" continua a restituire 403 Forbidden quando acces
 - `src/AssetTab.php`: Aggiunti metodi `startBackup()`, `saveInternetMode()`, `saveDefaultDirs()`
 - `src/UrbackupApiClient.php`: Aggiunti metodi `updateClientSettings()`, `saveInternetMode()`
 - `front/asset.form.php`: Gestione azioni per salvataggio impostazioni e backup
+
+### Refactoring server.form.php e nuove tab (v0.4.7)
+
+**Data**: 2026-05-21
+
+**Descrizione**: Restrutturazione completa della pagina server con tab laterali e nuove funzionalità:
+
+**Refactoring Server::showForm()**:
+- Estratto `showFormFields(?int $ID)` da `showForm()` per permettere layout custom
+- `showForm()` ora chiama header + fields + buttons in sequenza
+
+**Tab laterali (server.form.php)**:
+- Side tabs a sinistra (col-2) con `nav-pills flex-column`
+- 4 tab: Server, Linked clients, Unlinked clients, Missing clients
+- Tab persistence via URL hash (JS su `shown.bs.tab`)
+
+**Missing clients tab**:
+- Mostra asset GLPI con root location matching, non ancora collegati a ServerAsset e non presenti su UrBackup
+- Colonne: Name (link all'asset), Entity, Location (completename), Inventory number, IP, State, User, Group
+- Ricerca testuale client-side
+- Ordinamento colonne click-to-sort vanilla JS
+- Navigazione server spostata in server.form.php (sopra i tab, indipendente dalle sezioni)
+
+**Bug fix namespace risolto**:
+- `getCachedName()` usava `new $classname()` con stringa → PHP cercava `GlpiPlugin\Urbackup\Group` invece di `\Group`
+- Fix: `$fqcn = '\\' . ltrim($classname, '\\')` per forzare global namespace
+
+**Gruppo asset corretto**:
+- Gruppo non in `glpi_computers.groups_id` (colonna inesistente)
+- Letto da `glpi_groups_items` WHERE `type = 1` (GROUP_TYPE_NORMAL)
+- Usa `completename` per gerarchia (es. "Helpdesk > Livello 1")
+
+**Indirizzo IP asset**:
+- Query JOIN: `glpi_ipaddresses → glpi_networknames → glpi_networkports`
+- Primo IP valido per l'item
+
+**Breadcrumb**:
+- Cambiato da `'Assets'` a `'admin'` in `Html::header()` di server.php e server.form.php
+- Mostra: Pagina principale > Amministrazione > UrBackup servers
+
+**Fix port default per nuovi server**:
+- `prepareInputForAdd()` ora setta default 55414 per `port`, 'http' per `protocol`, 1 per `is_active`, ecc.
+- `prepareInputForUpdate()` normalizza anche valori vuoti
+
+**File modificati**:
+- `src/Server.php`: `showFormFields()`, `showMissingClientsTab()`, `getCachedName()` fix, `getAssetGroupName()`, `getAssetIp()`, `getCachedLocationName()`, `prepareInputForAdd/Update` default fix
+- `front/server.form.php`: Tab laterali, tab hash JS, breadcrumb admin
+- `front/server.php`: Breadcrumb admin, rimosso pulsante "Add" manuale (GLPI lo genera)
diff --git a/front/server.form.php b/front/server.form.php
index b8cade9..22e2037 100644
--- a/front/server.form.php
+++ b/front/server.form.php
@@ -47,13 +47,62 @@ $ID = $_GET['id'] ?? null;
 Html::header(
     $ID ? __('Edit UrBackup server', 'urbackup') : __('Add UrBackup server', 'urbackup'),
     '',
-    'Assets',
+    'admin',
     'GlpiPlugin\Urbackup\Server'
 );
 
 if ($ID > 0) {
+    global $DB;
+
     $server->getFromDB($ID);
+
+    $serverIterator = $DB->request([
+        'FROM'  => Server::getTable(),
+        'ORDER' => 'name',
+    ]);
+    $serverIds = [];
+    foreach ($serverIterator as $row) {
+        $serverIds[(int) $row['id']] = (string) $row['name'];
+    }
+    $serverIdKeys = array_keys($serverIds);
+    $currentIndex = array_search((int) $ID, $serverIdKeys, true);
+    $totalServers = count($serverIds);
+    $prevId = ($currentIndex !== false && $currentIndex > 0) ? $serverIdKeys[$currentIndex - 1] : null;
+    $nextId = ($currentIndex !== false && $currentIndex < $totalServers - 1) ? $serverIdKeys[$currentIndex + 1] : null;
+
+    $baseUrl = PLUGIN_URBACKUP_WEB_DIR . '/front/server.form.php';
     ?>
+    <div class="d-flex justify-content-between align-items-center mb-2">
+        <div class="d-flex align-items-center">
+            <a href="<?php echo htmlspecialchars(PLUGIN_URBACKUP_WEB_DIR . '/front/server.php'); ?>" class="btn btn-sm btn-icon btn-ghost-secondary me-2"
+               data-bs-toggle="tooltip" data-bs-placement="bottom" title="<?php echo htmlspecialchars(__('List')); ?>">
+                <i class="ti ti-list-search fs-2"></i>
+            </a>
+            <?php if ($prevId !== null): ?>
+                <a href="<?php echo htmlspecialchars($baseUrl . '?id=' . $prevId); ?>"
+                   class="btn btn-sm btn-icon btn-ghost-secondary me-2"
+                   data-bs-toggle="tooltip" data-bs-placement="bottom" title="<?php echo htmlspecialchars(__('Previous')); ?>">
+                    <i class="fs-2 ti ti-chevron-left"></i>
+                </a>
+            <?php else: ?>
+                <span class="btn btn-sm btn-icon btn-ghost-secondary me-2 bs-invisible">
+                    <i class="fs-2 ti ti-chevron-left"></i>
+                </span>
+            <?php endif; ?>
+            <span class="fw-bold mx-2"><?php echo htmlspecialchars(($currentIndex !== false ? $currentIndex + 1 : 1) . ' / ' . $totalServers); ?></span>
+            <?php if ($nextId !== null): ?>
+                <a href="<?php echo htmlspecialchars($baseUrl . '?id=' . $nextId); ?>"
+                   class="btn btn-sm btn-icon btn-ghost-secondary ms-2"
+                   data-bs-toggle="tooltip" data-bs-placement="bottom" title="<?php echo htmlspecialchars(__('Next')); ?>">
+                    <i class="fs-2 ti ti-chevron-right"></i>
+                </a>
+            <?php else: ?>
+                <span class="btn btn-sm btn-icon btn-ghost-secondary ms-2 bs-invisible">
+                    <i class="fs-2 ti ti-chevron-right"></i>
+                </span>
+            <?php endif; ?>
+        </div>
+    </div>
     <div class="row">
         <div class="col-2">
             <ul class="nav nav-pills flex-column">
@@ -101,4 +150,17 @@ if ($ID > 0) {
     $server->showForm($ID);
 }
 
+?>
+<script>
+$(function () {
+    var hash = window.location.hash;
+    if (hash) {
+        $('[data-bs-toggle="tab"][href="' + hash + '"]').tab('show');
+    }
+    $('[data-bs-toggle="tab"]').on('shown.bs.tab', function (e) {
+        window.location.hash = $(this).attr('href');
+    });
+});
+</script>
+<?php
 Html::footer();
diff --git a/front/server.php b/front/server.php
index 3b25f0d..447ced7 100644
--- a/front/server.php
+++ b/front/server.php
@@ -15,27 +15,13 @@ if (!Profile::canCurrentUser(READ)) {
     Html::displayRightError();
 }
 
-$can_read = Profile::canCurrentUser(READ);
-$can_create = Profile::canCurrentUser(CREATE);
-
 Html::header(
     'UrBackup Servers',
     '',
-    'Assets',
-    ''
+    'admin',
+    'GlpiPlugin\Urbackup\Server'
 );
 
-if ($can_create) {
-    echo "<div class='center'>";
-    echo Html::link(
-        __('Add UrBackup server', 'urbackup'),
-        '/plugins/urbackup/front/server.form.php',
-        ['class' => 'btn btn-primary']
-    );
-    echo "</div>";
-    echo "<br>";
-}
-
 Search::show('GlpiPlugin\Urbackup\Server', [
     'is_deleted'        => 0,
     'massiveaction'    => true,
@@ -45,4 +31,4 @@ Search::show('GlpiPlugin\Urbackup\Server', [
     ],
 ]);
 
-Html::footer();
\ No newline at end of file
+Html::footer();
diff --git a/src/Server.php b/src/Server.php
index cf41231..675212b 100644
--- a/src/Server.php
+++ b/src/Server.php
@@ -333,7 +333,7 @@ class Server extends CommonDBTM
         return true;
     }
 
-    public function showFormFields(int $ID): void
+    public function showFormFields(?int $ID): void
     {
         echo "<tr class='tab_bg_1'>";
         echo "<td>" . htmlspecialchars(__('Name')) . "</td>";
@@ -548,6 +548,26 @@ class Server extends CommonDBTM
 
     public function prepareInputForAdd(mixed $input): mixed
     {
+        if (!is_array($input)) {
+            return $input;
+        }
+
+        if (!isset($input['port']) || $input['port'] === '' || $input['port'] === null) {
+            $input['port'] = 55414;
+        }
+        if (!isset($input['protocol']) || $input['protocol'] === '') {
+            $input['protocol'] = 'http';
+        }
+        if (!isset($input['is_active']) || $input['is_active'] === '' || $input['is_active'] === null) {
+            $input['is_active'] = 1;
+        }
+        if (!isset($input['is_recursive']) || $input['is_recursive'] === '' || $input['is_recursive'] === null) {
+            $input['is_recursive'] = 0;
+        }
+        if (!isset($input['ignore_ssl']) || $input['ignore_ssl'] === '' || $input['ignore_ssl'] === null) {
+            $input['ignore_ssl'] = 0;
+        }
+
         return $this->prepareInputForUpdate($input);
     }
 
@@ -557,6 +577,16 @@ class Server extends CommonDBTM
             return $input;
         }
 
+        if (isset($input['port']) && ($input['port'] === '' || $input['port'] === null)) {
+            $input['port'] = 55414;
+        }
+        if (isset($input['protocol']) && $input['protocol'] === '') {
+            $input['protocol'] = 'http';
+        }
+        if (isset($input['ignore_ssl']) && ($input['ignore_ssl'] === '' || $input['ignore_ssl'] === null)) {
+            $input['ignore_ssl'] = 0;
+        }
+
         if (!empty($input['id']) && (int) $input['id'] > 0) {
             $server = new self();
             if ($server->getFromDB((int) $input['id'])) {
@@ -1148,25 +1178,41 @@ class Server extends CommonDBTM
             return;
         }
 
+        echo '<div class="d-flex justify-content-end mb-2">';
+        echo '<input type="text" id="missing-search" class="form-control form-control-sm" placeholder="' . htmlspecialchars(__('Search...', 'urbackup')) . '" style="width:250px">';
+        echo '</div>';
+
         $formAction = PLUGIN_URBACKUP_WEB_DIR . '/front/server.form.php';
 
-        echo '<table class="table table-striped table-hover">';
+        echo '<table id="missing-table" class="table table-striped table-hover">';
         echo '<thead><tr>';
-        echo '<th>' . htmlspecialchars(__('Name')) . '</th>';
-        echo '<th>' . htmlspecialchars(Entity::getTypeName(1)) . '</th>';
-        echo '<th>' . htmlspecialchars(Location::getTypeName(1)) . '</th>';
-        echo '<th>' . htmlspecialchars(__('Inventory number')) . '</th>';
-        echo '<th>' . htmlspecialchars(__('IP address', 'urbackup')) . '</th>';
-        echo '<th>' . htmlspecialchars(State::getTypeName(1)) . '</th>';
-        echo '<th>' . htmlspecialchars(User::getTypeName(1)) . '</th>';
-        echo '<th>' . htmlspecialchars(Group::getTypeName(1)) . '</th>';
-        echo '<th>' . htmlspecialchars(__('Actions', 'urbackup')) . '</th>';
+        echo '<th class="sortable" data-col="0">' . htmlspecialchars(__('Name')) . ' <span class="sort-arrow"></span></th>';
+        echo '<th class="sortable" data-col="1">' . htmlspecialchars(Entity::getTypeName(1)) . ' <span class="sort-arrow"></span></th>';
+        echo '<th class="sortable" data-col="2">' . htmlspecialchars(Location::getTypeName(1)) . ' <span class="sort-arrow"></span></th>';
+        echo '<th class="sortable" data-col="3">' . htmlspecialchars(__('Inventory number')) . ' <span class="sort-arrow"></span></th>';
+        echo '<th class="sortable" data-col="4">' . htmlspecialchars(__('IP address', 'urbackup')) . ' <span class="sort-arrow"></span></th>';
+        echo '<th class="sortable" data-col="5">' . htmlspecialchars(State::getTypeName(1)) . ' <span class="sort-arrow"></span></th>';
+        echo '<th class="sortable" data-col="6">' . htmlspecialchars(User::getTypeName(1)) . ' <span class="sort-arrow"></span></th>';
+        echo '<th class="sortable" data-col="7">' . htmlspecialchars(Group::getTypeName(1)) . ' <span class="sort-arrow"></span></th>';
+        echo '<th data-col="8">' . htmlspecialchars(__('Actions', 'urbackup')) . '</th>';
         echo '</tr></thead>';
         echo '<tbody>';
 
         foreach ($missingAssets as $asset) {
+            $item = new $asset['itemtype']();
+            $itemLink = '';
+            if ($item instanceof CommonDBTM && $item->getFromDB($asset['items_id'])) {
+                $itemLink = $item->getLinkURL();
+            }
+
             echo '<tr>';
-            echo '<td>' . htmlspecialchars($asset['name']) . '</td>';
+            echo '<td>';
+            if ($itemLink !== '') {
+                echo '<a href="' . htmlspecialchars($itemLink) . '">' . htmlspecialchars($asset['name']) . '</a>';
+            } else {
+                echo htmlspecialchars($asset['name']);
+            }
+            echo '</td>';
             echo '<td>' . htmlspecialchars($asset['entity']) . '</td>';
             echo '<td>' . htmlspecialchars($asset['location']) . '</td>';
             echo '<td>' . htmlspecialchars($asset['otherserial']) . '</td>';
@@ -1190,6 +1236,50 @@ class Server extends CommonDBTM
 
         echo '</tbody>';
         echo '</table>';
+
+        echo <<<'JAVASCRIPT'
+<script>
+$(function () {
+    var sortDir = {};
+    $('#missing-table th.sortable').on('click', function () {
+        var col = parseInt($(this).data('col'));
+        var $table = $('#missing-table');
+        var $tbody = $table.find('tbody');
+        var rows = $tbody.find('tr').get();
+
+        var dir = sortDir[col] === 'asc' ? 'desc' : 'asc';
+        sortDir[col] = dir;
+
+        rows.sort(function (a, b) {
+            var aVal = $(a).children('td').eq(col).text().trim().toLowerCase();
+            var bVal = $(b).children('td').eq(col).text().trim().toLowerCase();
+            if (aVal < bVal) return dir === 'asc' ? -1 : 1;
+            if (aVal > bVal) return dir === 'asc' ? 1 : -1;
+            return 0;
+        });
+
+        $.each(rows, function (i, row) { $tbody.append(row); });
+
+        $table.find('th .sort-arrow').text('');
+        $(this).find('.sort-arrow').text(dir === 'asc' ? '\u25B2' : '\u25BC');
+    });
+
+    $('#missing-search').on('keyup', function () {
+        var val = $(this).val().toLowerCase();
+        $('#missing-table tbody tr').each(function () {
+            var match = false;
+            $(this).children('td').each(function () {
+                if ($(this).text().toLowerCase().indexOf(val) > -1) {
+                    match = true;
+                    return false;
+                }
+            });
+            $(this).toggle(match);
+        });
+    });
+});
+</script>
+JAVASCRIPT;
     }
 
     private static function getCachedName(string $classname, int $id, array &$cache): string
@@ -1201,7 +1291,7 @@ class Server extends CommonDBTM
             $fqcn = '\\' . ltrim($classname, '\\');
             $obj = new $fqcn();
             if ($obj->getFromDB($id)) {
-                $cache[$id] = (string) ($obj->fields['name'] ?? '');
+                $cache[$id] = (string) ($obj->fields['completename'] ?? $obj->fields['name'] ?? '');
             } else {
                 $cache[$id] = '';
             }