diff --git a/docs/migrations.rst b/docs/migrations.rst
index 9916fcb..9b30dd9 100644
--- a/docs/migrations.rst
+++ b/docs/migrations.rst
@@ -59,13 +59,16 @@ For remediating this issue the following steps are required:
    - ``--layout default`` unless ``useFSLayout`` is enabled, then ``--layout folder``
    - The value of ``mailserver.mailDirectory``, which defaults to ``/var/vmail``
 
+   The script should be run under the user who owns the ``mailDirectory``.
+   If run as root it will try to switch into the appropriate user by itself.
+
    The script will not modify your data unless called with ``--execute``.
 
    Example:
 
    .. code-block:: bash
 
-      sudo -u virtualMail ./nixos-mailserver-migration-03.py --layout default /var/vmail
+      ./nixos-mailserver-migration-03.py --layout default /var/vmail
 
 5. Review the commands. They should be