diff --git a/maintenance/retention.rst b/maintenance/retention.rst
index 1cff42e..8df486a 100644
--- a/maintenance/retention.rst
+++ b/maintenance/retention.rst
@@ -11,6 +11,10 @@ reasonable level. Additionally, raw data on disk and sandbox files can
 also be deleted with the Data Retention Policy, which can help you to
 manage your disk space usage.
 
+
+.. hint::
+   Data Retention takes the import timestamp '@timestamp' into account to decide whether an event should be deleted or not.
+
 The Data Retention Policy is configured in ``Settings`` > ``Advanced`` >
 ``Data Retention``.
 
@@ -73,4 +77,4 @@ There are multiple options within the Data Retention Policy:
   .. figure:: ../images/cockpit_data-retention-other.png
       :alt: Data Retention - Others
 
-      Data Retention - Others
\ No newline at end of file
+      Data Retention - Others
diff --git a/pitfalls/pitfalls.rst b/pitfalls/pitfalls.rst
index 3f6d7d4..559381f 100644
--- a/pitfalls/pitfalls.rst
+++ b/pitfalls/pitfalls.rst
@@ -152,18 +152,12 @@ on a Linux system for all the different services and command line tools.
 Broken before Analysis Cockpit Installation
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-If you have set a wrong proxy before the package installation using the
-**sudo nextronInstaller -cockpit** command and the installer failed to
-fetch the required packages from our update servers, perform the
-following steps.
+If you have set a wrong proxy while the Debian setup and the connectivity test fails, 
+edit the proxy settings in the Web GUI of the NEXTRON Universal Installer:
 
-Fix the proxy string in the file ``/etc/apt/apt.conf.d/00proxy``
+``Settings`` > ``Proxy``
 
-.. code:: console
-   
-   nextron@cockpit:~$ sudoedit /etc/apt/apt.conf.d/00proxy
-
-Then rerun the installer.
+Then rerun the connectivity test.
 
 Broken after the Analysis Cockpit Installation
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^