diff --git a/assets/js/woocow-admin.js b/assets/js/woocow-admin.js
index 7d22132..b428246 100644
--- a/assets/js/woocow-admin.js
+++ b/assets/js/woocow-admin.js
@@ -312,10 +312,11 @@
                             <th>Email</th><th>Name</th><th>Quota Used</th><th>Quota Max</th><th>Active</th><th>Actions</th>
                         </tr></thead><tbody>`;
                     boxes.forEach(m => {
-                        const pct  = m.percent_in_use || 0;
-                        const used = formatMB(m.quota_used);
-                        const max  = formatMB(m.quota);
-                        const bar  = `<div class="woocow-quota-bar"><div style="width:${pct}%"></div></div>`;
+                        const pct    = m.percent_in_use || 0;
+                        const used   = formatMB(m.quota_used);
+                        const max    = formatMB(m.quota);
+                        const bar    = `<div class="woocow-quota-bar"><div style="width:${pct}%"></div></div>`;
+                        const quotaMB = Math.round((m.quota || 0) / 1024 / 1024);
                         html += `<tr>
                             <td><a href="${esc(webmail)}" target="_blank">${esc(m.username)}</a></td>
                             <td>${esc(m.name)}</td>
@@ -323,7 +324,12 @@
                             <td>${max}</td>
                             <td>${m.active == 1 ? '✓' : '–'}</td>
                             <td class="woocow-actions">
-                                <button class="button button-small wc-mb-del" data-email="${esc(m.username)}" style="color:#a00">Delete</button>
+                                <button class="button button-small wc-mb-reset-pw"
+                                    data-email="${esc(m.username)}">Reset PW</button>
+                                <button class="button button-small wc-mb-set-quota"
+                                    data-email="${esc(m.username)}" data-quota="${quotaMB}">Set Quota</button>
+                                <button class="button button-small wc-mb-del"
+                                    data-email="${esc(m.username)}" style="color:#a00">Delete</button>
                             </td>
                         </tr>`;
                     });
@@ -379,6 +385,69 @@
                 else notice($('#wc-mb-notices'), 'error', res.data);
             });
         });
+
+        // ── Edit modal: Reset PW ──────────────────────────────────────────────
+
+        let editEmail = '';
+        let editType  = '';
+
+        const openEditModal = (email, type, currentQuota) => {
+            editEmail = email;
+            editType  = type;
+            $('#wc-mb-edit-subtitle').text(email);
+            $('#wc-mb-edit-notice').text('');
+            $('#wc-mb-edit-pw-section, #wc-mb-edit-quota-section').hide();
+
+            if (type === 'password') {
+                $('#wc-mb-edit-title').text('Reset Password');
+                $('#wc-mb-edit-pass, #wc-mb-edit-pass2').val('');
+                $('#wc-mb-edit-pw-section').show();
+                setTimeout(() => $('#wc-mb-edit-pass').trigger('focus'), 100);
+            } else {
+                $('#wc-mb-edit-title').text('Set Quota');
+                $('#wc-mb-edit-quota').val(currentQuota || 1024);
+                $('#wc-mb-edit-quota-section').show();
+                setTimeout(() => $('#wc-mb-edit-quota').trigger('focus'), 100);
+            }
+            $('#wc-mb-edit-modal').show();
+        };
+
+        $(document).on('click', '.wc-mb-reset-pw', function () {
+            openEditModal($(this).data('email'), 'password', null);
+        });
+
+        $(document).on('click', '.wc-mb-set-quota', function () {
+            openEditModal($(this).data('email'), 'quota', $(this).data('quota'));
+        });
+
+        $('#wc-mb-edit-cancel').on('click', () => $('#wc-mb-edit-modal').hide());
+        $(document).on('keydown', e => { if (e.key === 'Escape') $('#wc-mb-edit-modal').hide(); });
+
+        $('#wc-mb-edit-save').on('click', () => {
+            const $note = $('#wc-mb-edit-notice').text('Saving…');
+            const data  = { server_id: currentServerId, email: editEmail, type: editType };
+
+            if (editType === 'password') {
+                data.password  = $('#wc-mb-edit-pass').val();
+                data.password2 = $('#wc-mb-edit-pass2').val();
+                if (!data.password) { $note.html('<span style="color:red">Password cannot be empty.</span>'); return; }
+                if (data.password !== data.password2) { $note.html('<span style="color:red">Passwords do not match.</span>'); return; }
+            } else {
+                data.quota = $('#wc-mb-edit-quota').val();
+                if (!data.quota || data.quota < 1) { $note.html('<span style="color:red">Enter a valid quota.</span>'); return; }
+            }
+
+            ajax('woocow_admin_mailbox_edit', data).done(res => {
+                if (res.success) {
+                    $('#wc-mb-edit-modal').hide();
+                    const msg = editType === 'password' ? 'Password updated.' : 'Quota updated.';
+                    notice($('#wc-mb-notices'), 'success', `<strong>${esc(editEmail)}</strong> — ${msg}`);
+                    if (editType === 'quota') loadMailboxes(); // refresh to show new quota
+                } else {
+                    $note.html(`<span style="color:red">${esc(res.data)}</span>`);
+                }
+            });
+        });
     }
 
     // ── Utilities ─────────────────────────────────────────────────────────────
diff --git a/includes/class-woocow-admin.php b/includes/class-woocow-admin.php
index d2dbbb2..9e58fe0 100644
--- a/includes/class-woocow-admin.php
+++ b/includes/class-woocow-admin.php
@@ -23,6 +23,7 @@ class WooCow_Admin {
             'woocow_admin_mailboxes',
             'woocow_admin_mailbox_create',
             'woocow_admin_mailbox_delete',
+            'woocow_admin_mailbox_edit',
         ];
 
         foreach ( $ajax_actions as $action ) {
@@ -218,6 +219,45 @@ class WooCow_Admin {
             <div id="wc-mb-notices"></div>
             <div id="wc-mb-table-wrap"></div>
 
+            <!-- Edit Mailbox Modal (password / quota) -->
+            <div id="wc-mb-edit-modal" class="woocow-modal" style="display:none">
+                <div class="woocow-modal-box">
+                    <h3 id="wc-mb-edit-title">Edit Mailbox</h3>
+                    <p id="wc-mb-edit-subtitle" class="woocow-modal-subtitle"></p>
+
+                    <div id="wc-mb-edit-pw-section" style="display:none">
+                        <table class="form-table">
+                            <tr>
+                                <th><label for="wc-mb-edit-pass">New Password</label></th>
+                                <td><input type="password" id="wc-mb-edit-pass" class="regular-text" autocomplete="new-password"></td>
+                            </tr>
+                            <tr>
+                                <th><label for="wc-mb-edit-pass2">Confirm Password</label></th>
+                                <td><input type="password" id="wc-mb-edit-pass2" class="regular-text" autocomplete="new-password"></td>
+                            </tr>
+                        </table>
+                    </div>
+
+                    <div id="wc-mb-edit-quota-section" style="display:none">
+                        <table class="form-table">
+                            <tr>
+                                <th><label for="wc-mb-edit-quota">Max Quota (MB)</label></th>
+                                <td>
+                                    <input type="number" id="wc-mb-edit-quota" class="small-text" min="1" step="1">
+                                    <p class="description">Current usage is shown in the mailbox list. 1024 MB = 1 GB.</p>
+                                </td>
+                            </tr>
+                        </table>
+                    </div>
+
+                    <div class="woocow-modal-actions">
+                        <button class="button button-primary" id="wc-mb-edit-save">Save</button>
+                        <button class="button" id="wc-mb-edit-cancel">Cancel</button>
+                        <span id="wc-mb-edit-notice"></span>
+                    </div>
+                </div>
+            </div>
+
             <!-- Create Mailbox Modal -->
             <div id="wc-mb-modal" class="woocow-modal" style="display:none">
                 <div class="woocow-modal-box">
@@ -542,4 +582,54 @@ class WooCow_Admin {
 
         $this->json_ok();
     }
+
+    public function ajax_woocow_admin_mailbox_edit(): void {
+        $this->verify();
+
+        $server_id = absint( $_POST['server_id'] ?? 0 );
+        $email     = sanitize_email( $_POST['email'] ?? '' );
+        $type      = sanitize_text_field( $_POST['type'] ?? '' ); // 'password' or 'quota'
+
+        if ( ! $email ) {
+            $this->json_err( 'Email address is required.' );
+        }
+
+        $server = $this->get_server( $server_id );
+        if ( ! $server ) {
+            $this->json_err( 'Server not found.' );
+        }
+
+        $api  = WooCow_API::from_server( $server );
+        $attr = [];
+
+        if ( $type === 'password' ) {
+            $pass  = $_POST['password']  ?? '';
+            $pass2 = $_POST['password2'] ?? '';
+            if ( ! $pass ) {
+                $this->json_err( 'Password cannot be empty.' );
+            }
+            if ( $pass !== $pass2 ) {
+                $this->json_err( 'Passwords do not match.' );
+            }
+            $attr = [ 'password' => $pass, 'password2' => $pass2 ];
+
+        } elseif ( $type === 'quota' ) {
+            $quota = absint( $_POST['quota'] ?? 0 );
+            if ( $quota < 1 ) {
+                $this->json_err( 'Quota must be at least 1 MB.' );
+            }
+            $attr = [ 'quota' => $quota ];
+
+        } else {
+            $this->json_err( 'Unknown edit type.' );
+        }
+
+        $result = $api->edit_mailbox( [ $email ], $attr );
+
+        if ( ! $result['success'] ) {
+            $this->json_err( $result['error'] ?? 'Failed to update mailbox.' );
+        }
+
+        $this->json_ok();
+    }
 }