diff --git a/edh-keygen.sh b/edh-keygen.sh
index 70ea91f..a837413 100644
--- a/edh-keygen.sh
+++ b/edh-keygen.sh
@@ -23,7 +23,7 @@
 # Authors:  Ivo Noack aka Insonic <me@jabber.ivonoack.de>
 #           Stephan Düsterhaupt <me@jabber.stephanduesterhaupt.de>
 #
-# Copyright (c) 2016-2025 CB-601 - the open tec Elevator <mail@opensource-technology.de>
+# Copyright (c) 2016-2026 CB-601 - the open tec Elevator <mail@opensource-technology.de>
 # License:  MIT
 #
 # Project Home: https://dev.town-square.de/cb601/edh-keygen
@@ -125,6 +125,11 @@ while IFS= read -r line || [ -n "$line" ]; do
     user_group=$(printf "%s" "$line" | awk -F: '{print $5}')
     permissions=$(printf "%s" "$line" | awk -F: '{print $6}')
 
+    # Convert legacy user.group notation to user:group
+    ug_user=${user_group%%.*}
+    ug_group=${user_group#*.}
+    user_group=$ug_user:$ug_group
+
     echo "$service.service (owner: $owner)..."
 
     # Check service status (must run as root)