diff --git a/Layout/default/OpenAccessId/Index.php b/Layout/default/OpenAccessId/Index.php
index cd0251af7..082c49fd4 100644
--- a/Layout/default/OpenAccessId/Index.php
+++ b/Layout/default/OpenAccessId/Index.php
@@ -122,8 +122,8 @@
                 <th>Herkunft</th>
                 <th>Besitzer</th>
                 <th colspan="2" title="Anzahl ADB Wohneinheiten">Zugewiesen</th>
-                <th>Exportiert</th>
                 <th></th>
+                <th>Exportiert</th>
                 <th></th>
               </tr>
               <?php foreach($oaids as $oaid): ?>
@@ -136,6 +136,7 @@
                 <td><?=$oaid->owner->getCompanyOrName()?></td>
                 <td class="text-right <?=($oaid->adb_wohneinheit_count > 1 || $oaid->adb_wohneinheit_id && $oaid->adb_wohneinheit_count < 1) ? "text-danger" : ""?>">
                   <?=($oaid->adb_wohneinheit_id) ? $oaid->adb_wohneinheit_count."x" : ""?>
+                    <a class="ml-2" href="<?=self::getUrl("OpenAccessId", "release", ["id" => $oaid->id])?>" title="OAID freigeben" onclick="if(!confirm('Sind Sie sicher, dass die OAID von Wohneinheit, Preorder und Rimo-FTU entfernt werden soll?')) return false;"><i class="far fa-link-slash"></i></a>
                 </td>
                 <td>
                   <?php if($oaid->termination_id): ?>
@@ -151,7 +152,11 @@
                     <?=((string)$oaid->adb_wohneinheit) ? " - ".(string)$oaid->adb_wohneinheit : ""?>
                   <?php endif; ?>
                 </td>
-                <td><?=($oaid->assigned) ? date("d.m.Y H:i",$oaid->assigned) : ""?></td>
+                <td>
+                    <?php if($oaid->assigned): ?>
+                        <?=date("d.m.Y H:i",$oaid->assigned)?>
+                    <?php endif; ?>
+                </td>
                 <td>
                   <?php if($oaid->exported_to): ?>
                     [<?=$oaid->exported_to?>]
diff --git a/application/ADBHausnummer/ADBHausnummer.php b/application/ADBHausnummer/ADBHausnummer.php
index df17b46b0..1194c35e5 100644
--- a/application/ADBHausnummer/ADBHausnummer.php
+++ b/application/ADBHausnummer/ADBHausnummer.php
@@ -17,7 +17,7 @@ class ADBHausnummer extends mfBaseModel {
     mfValuecache::singleton()->set("adbhausnummer-save-nesting-level-".$this->id, 0);
   }
 
-    public function afterSave() {
+    public function afterSave($_params = []) {
       // prevent potential infinite loop
       $nesting_level = mfValuecache::singleton()->get("adbhausnummer-save-nesting-level-".$this->id);
       if(!$nesting_level) {
diff --git a/application/ADBWohneinheit/ADBWohneinheit.php b/application/ADBWohneinheit/ADBWohneinheit.php
index fac68ebfa..8d0873f5e 100644
--- a/application/ADBWohneinheit/ADBWohneinheit.php
+++ b/application/ADBWohneinheit/ADBWohneinheit.php
@@ -22,7 +22,7 @@ class ADBWohneinheit extends mfBaseModel {
       $this->refreshUnitCount();
   }
 
-  protected function afterSave() {
+  protected function afterSave($_params = []) {
     if(!$this->id) return true;
     if(!$this->hausnummer_id) return true;
 
@@ -40,8 +40,12 @@ class ADBWohneinheit extends mfBaseModel {
       }
 
       $this->logChanges();
-    // Statuschange from Rimo statuschange
-    AddressDB::handleRimoStatusUpdate($this->id);
+
+    if(!array_key_exists("no_updates", $_params) || !$_params['no_updates']) {
+        // Statuschange from Rimo statuschange
+        AddressDB::handleRimoStatusUpdate($this->id);
+    }
+
 
     $this->refreshUnitCount();
   }
diff --git a/application/ADBWohneinheitStatusflagValue/ADBWohneinheitStatusflagValue.php b/application/ADBWohneinheitStatusflagValue/ADBWohneinheitStatusflagValue.php
index ac116eba3..f7c748fc5 100644
--- a/application/ADBWohneinheitStatusflagValue/ADBWohneinheitStatusflagValue.php
+++ b/application/ADBWohneinheitStatusflagValue/ADBWohneinheitStatusflagValue.php
@@ -8,7 +8,7 @@ class ADBWohneinheitStatusflagValue extends mfBaseModel {
         $this->table = "WohneinheitStatusflagValue";
     }
 
-    protected function afterSave() {
+    protected function afterSave($_params = []) {
         if(!property_exists($this->_old_data, "value") || $this->_old_data->value != $this->data->value) {
             // cascade new status to all preorders
             foreach(PreorderModel::search(["adb_wohneinheit_id" => $this->wohneinheit_id]) as $preorder) {
diff --git a/application/Address/Address.php b/application/Address/Address.php
index c0dc8a2b4..63d4d0a14 100644
--- a/application/Address/Address.php
+++ b/application/Address/Address.php
@@ -20,7 +20,7 @@ class Address extends mfBaseModel {
   private $creator;
   private $editor;
 
-  public function afterSave() {
+  public function afterSave($_params = []) {
     // prevent potential infinite loop
     if($this->in_after_save) return true;
     $this->in_after_save++;
diff --git a/application/OpenAccessId/OpenAccessIdController.php b/application/OpenAccessId/OpenAccessIdController.php
index 83d249819..03794d5b2 100644
--- a/application/OpenAccessId/OpenAccessIdController.php
+++ b/application/OpenAccessId/OpenAccessIdController.php
@@ -86,7 +86,56 @@ class OpenAccessIdController extends mfBaseController {
     
     return $new_filter;
   }
-  
+
+  protected function releaseAction() {
+      $id = $this->request->id;
+      if(!$id || $id <1) {
+          $this->layout()->setFlash("Ungültige OAID", "error");
+          $this->redirect("OpenAccessId");
+      }
+
+      $oaid = new OpenAccessId($id);
+      if(!$oaid->id) {
+          $this->layout()->setFlash("Ungültige OAID", "error");
+          $this->redirect("OpenAccessId");
+      }
+
+      $oaid->startTransaction();
+
+      // remove from Preorders
+      foreach(PreorderModel::search(["oaid" => $oaid->oaid]) as $preorder) {
+          $preorder->oaid = null;
+          $preorder->save(["no_oaid_update" => true, "dont_cascade" => true]);
+      }
+
+      // remove from Wohneinheiten
+      foreach(ADBWohneinheitModel::search(["oaid" => $oaid->oaid]) as $unit) {
+          $unit->oaid = null;
+          $unit->save(["no_updates" => 1]);
+
+          $ftu_id = $unit->ftu_data["id"];
+          if($ftu_id) {
+              $this->log->debug(__METHOD__.": trying to unassign Oaid ".$oaid->oaid." from Rimo FTU ".$ftu_id);
+              //Rimoapi::unassignOaid($oaid->oaid, $ftu_id);
+          }
+      }
+
+
+      $oaid->assigned = 0;
+      $oaid->adb_wohneinheit_id = null;
+      $oaid->exported = 0;
+      $oaid->exported_to = null;
+      $oaid->export_data = null;
+      $oaid->address = null;
+      $oaid->unit_string = null;
+      $oaid->save();
+
+      $oaid->commitTransaction();
+
+      $this->layout()->setFlash("OAID erfolgreich freigegeben");
+      $this->redirect("OpenAccessId");
+  }
+
   protected function changeADBWohneinheitAction() {
     $this->layout()->setTemplate("OpenAccessId/ChangeUnit");
     $id = $this->request->id;
diff --git a/application/Preorder/Preorder.php b/application/Preorder/Preorder.php
index c5a90a801..2557a3cc7 100644
--- a/application/Preorder/Preorder.php
+++ b/application/Preorder/Preorder.php
@@ -38,13 +38,13 @@ class Preorder extends mfBaseModel {
         }
     }
 
-    public function beforeSave() {
+    public function beforeSave($_params = []) {
         if(!isset($this->data->status_id)) {
             $this->data->status_id = 1;
         }
     }
 
-    public function afterSave() {
+    public function afterSave($_params = []) {
         // reset auto magic properties
         $this->status = null;
         $this->campaign = null;
@@ -71,29 +71,36 @@ class Preorder extends mfBaseModel {
             return true;
         }
 
-        // update preorder OAID if it's different from the unit OAID
-        // but only if the unit OAID is of the same origin as the campaign
-        $old_oaid = $this->oaid;
+        if(!array_key_exists("no_oaid_update", $_params) || !$_params['no_oaid_update']) {
+            // update preorder OAID if it's different from the unit OAID
+            // but only if the unit OAID is of the same origin as the campaign
+            $old_oaid = $this->oaid;
 
-        $this->setOrCreateOaid();
-        if($this->oaid != $old_oaid) {
-            $this->resetSaveNesting();
-            $this->save();
-            //return true;
+            $this->setOrCreateOaid();
+            if($this->oaid != $old_oaid) {
+                $this->resetSaveNesting();
+                $this->save();
+                //return true;
+            }
         }
 
+
         //TODO: history start
         //if($this->status_id != $this->_old_data->status_id) {
         $this->createHistoryEntry();
         //}
 
-        $this->updateRimoWorkorderContact();
-        // run triggers based on new status
-        $this->runStatusTrigger();
-        // Cascade status changes down to adb_hausnummer and adb_wohneinheit
-        $this->cascadeStatus();
-        // Cascade status changes down all active preorders with the same hausnummer
-        $this->cascadeStatusToPreorders();
+        if(!array_key_exists("dont_cascade", $_params) || !$_params['dont_cascade']) {
+            $this->updateRimoWorkorderContact();
+            // run triggers based on new status
+            $this->runStatusTrigger();
+            // Cascade status changes down to adb_hausnummer and adb_wohneinheit
+            $this->cascadeStatus();
+            // Cascade status changes down all active preorders with the same hausnummer
+            $this->cascadeStatusToPreorders();
+        }
+
+
     }
 
     public function resetSaveNesting() {
diff --git a/lib/mvcfronk/mfBase/mfBaseModel.php b/lib/mvcfronk/mfBase/mfBaseModel.php
index 20a3e384a..5b1aa08bb 100644
--- a/lib/mvcfronk/mfBase/mfBaseModel.php
+++ b/lib/mvcfronk/mfBase/mfBaseModel.php
@@ -148,9 +148,9 @@ class mfBaseModel {
         return true;
     }
 
-    public function save() {
+    public function save($_params = []) {
         if(method_exists($this, "beforeSave")) {
-            $this->beforeSave();
+            $this->beforeSave($_params);
         }
         $fields = $this->buildFields();
 
@@ -179,7 +179,7 @@ class mfBaseModel {
             if($this->db->update($this->table, $fields, $where, $forcestr)) {
                 $this->saved++;
                 if(method_exists($this, "afterSave")) {
-                    $this->afterSave();
+                    $this->afterSave($_params);
                 }
                 return $id;
             }
@@ -189,7 +189,7 @@ class mfBaseModel {
                 $this->id = $id;
                 $this->saved++;
                 if(method_exists($this, "afterSave")) {
-                    $this->afterSave();
+                    $this->afterSave($_params);
                 }
                 return $id;
             }