diff --git a/Layout/default/Preordercampaign/Form.php b/Layout/default/Preordercampaign/Form.php
index 2ad1f965c..9d813f7fb 100644
--- a/Layout/default/Preordercampaign/Form.php
+++ b/Layout/default/Preordercampaign/Form.php
@@ -271,6 +271,16 @@
                                     </div>
                                 </div>
 
+                                <div class="form-group row">
+                                    <label class="col-lg-2 col-form-label" for="create_external_patchports">Patchports in externen Systemen erzeugen:</label>
+                                    <div class="col-lg-10">
+                                        <select class="form-control" name="create_external_patchports" id="create_external_patchports">
+                                            <option value="0" <?= (!$campaign || !$campaign->create_external_patchports) ? "selected='selected'" : "" ?>>Nein</option>
+                                            <option value="1" <?= ($campaign && $campaign->create_external_patchports) ? "selected='selected'" : "" ?>>Ja</option>
+                                        </select>
+                                    </div>
+                                </div>
+
                                 <hr/>
 
                                 <div class="form-group row">
diff --git a/application/ADBWohneinheit/ADBWohneinheit.php b/application/ADBWohneinheit/ADBWohneinheit.php
index 349a674c5..b9de4d063 100644
--- a/application/ADBWohneinheit/ADBWohneinheit.php
+++ b/application/ADBWohneinheit/ADBWohneinheit.php
@@ -81,6 +81,15 @@ class ADBWohneinheit extends mfBaseModel {
           return true;
       }
 
+      if($hausnummer->netzgebiet->source == "citycom-oan-api") {
+          return true;
+      }
+
+      if(!preg_match('/^SDIBuilding_\d+_\d+$/', $hausnummer->rimo_id)) {
+          $this->log->info("[".$this->_ruid."] ".__METHOD__.": invalid rimo_id in Hausnummer ".$hausnummer->id);
+          return true;
+      }
+
       // Get RIMO API credentials
       $creds = $hausnummer->getNetownerRimoApiCredentials();
       if(!$creds) {
diff --git a/application/Api/v1/PreorderinfrastructureApicontroller.php b/application/Api/v1/PreorderinfrastructureApicontroller.php
new file mode 100644
index 000000000..cedaaa776
--- /dev/null
+++ b/application/Api/v1/PreorderinfrastructureApicontroller.php
@@ -0,0 +1,48 @@
+<?php
+
+class PreorderinfrastructureApiController extends mfBaseApicontroller {
+
+    protected function init() {
+        $this->allowMissingOrigin = true;
+    }
+
+    protected function registerRoutes() {
+        $this->addRoute("/preorderinfrastructure/patchportAssignmentOrders", "getPatchportAssignmentOrders", "GET");
+
+    }
+
+    protected function authenticated() {
+        $this->registerRoutes();
+        return true;
+    }
+
+    /**
+     * GET /preorderinfrastructure/patchportAssignmentOrders
+     * Returns Homes in patching enabled campaigns with status 245
+     *
+     * @return array mfRequest
+     */
+    protected function getPatchportAssignmentOrders() {
+        if($this->me->username != "system.preorder.infra.api.snopp") {
+            return mfResponse::Forbidden();
+        }
+
+        $campaigns = PreordercampaignModel::search(["create_external_patchports" => 1]);
+        if(!$campaigns) {
+            return mfResponse::Ok(["homes" => []]);
+        }
+
+        // get IDs of campaigns
+        $campaign_ids = array_map(fn($c): int => $c->id, $campaigns);
+
+        $homes = [];
+        foreach(PreorderModel::search(["preordercampaign_id" => $campaign_ids, "status_code" => 245]) as $preorder) {
+            if(!$preorder->adb_wohneinheit_id) continue;
+            $home = $preorder->adb_wohneinheit;
+            if(!$home->extref) continue;
+            $homes[] = $home->extref;
+        }
+
+        return mfResponse::Ok(["homes" => $homes]);
+    }
+}
\ No newline at end of file
diff --git a/application/Preordercampaign/PreordercampaignController.php b/application/Preordercampaign/PreordercampaignController.php
index 912ef1495..1be333cdc 100644
--- a/application/Preordercampaign/PreordercampaignController.php
+++ b/application/Preordercampaign/PreordercampaignController.php
@@ -286,6 +286,12 @@ class PreordercampaignController extends mfBaseController {
       $data['exist_is_error'] = 0;
     }
 
+    if($r->create_external_patchports == 1) {
+      $data['create_external_patchports'] = 1;
+    } else {
+      $data['create_external_patchports'] = 0;
+    }
+
     //var_dump($r->banned_rimo_fcp);exit;
     if($r->banned_rimo_fcp && is_array($r->banned_rimo_fcp) && count($r->banned_rimo_fcp)) {
       $banned_fcp_json = json_encode($r->banned_rimo_fcp);
diff --git a/application/Preordercampaign/PreordercampaignModel.php b/application/Preordercampaign/PreordercampaignModel.php
index 4dd79bc08..3acbf547b 100644
--- a/application/Preordercampaign/PreordercampaignModel.php
+++ b/application/Preordercampaign/PreordercampaignModel.php
@@ -15,6 +15,7 @@ class PreordercampaignModel {
   public $district_is_city;
   public $hausnummer_add_zusatz;
   public $exist_is_error;
+  public $create_external_patchports;
   public $require_connectiontype;
   public $allow_unit_update;
   public $netowner_fibu_cost_code;
@@ -164,6 +165,15 @@ class PreordercampaignModel {
               $where .= " AND `Preordercampaign`.`fulfillment` = '$fulfillment'";
           }
       }
+
+      if(array_key_exists("create_external_patchports", $filter)) {
+          $create_external_patchports = $filter['create_external_patchports'];
+          if($create_external_patchports) {
+              $where .= " AND create_external_patchports=1";
+          } else {
+              $where .= " AND create_external_patchports=0";
+          }
+      }
     
     if(array_key_exists("name", $filter)) {
       $name = FronkDB::singleton()->escape($filter['name']);
diff --git a/db/migrations/20260210155502_preordercampaign_add_create_external_patchports.php b/db/migrations/20260210155502_preordercampaign_add_create_external_patchports.php
new file mode 100644
index 000000000..205fe8c21
--- /dev/null
+++ b/db/migrations/20260210155502_preordercampaign_add_create_external_patchports.php
@@ -0,0 +1,31 @@
+<?php
+declare(strict_types=1);
+
+use Phinx\Migration\AbstractMigration;
+
+final class PreordercampaignAddCreateExternalPatchports extends AbstractMigration
+{
+    public function up(): void
+    {
+        if($this->getEnvironment() == "thetool") {
+            $table = $this->table("Preordercampaign");
+            $table->addColumn("create_external_patchports", "integer", ["null" => false, "default" => 0, "length" => Phinx\Db\Adapter\MysqlAdapter::INT_TINY, "after" => "allow_unit_update"]);
+            $table->update();
+        }
+        
+        if($this->getEnvironment() == "addressdb") {
+          
+        }
+    }
+
+    public function down(): void
+    {
+        if($this->getEnvironment() == "thetool") {
+          
+        }
+        
+        if($this->getEnvironment() == "addressdb") {
+          
+        }
+    }
+}