diff --git a/engineering-guide/accounts-and-groups.md b/engineering-guide/accounts-and-groups.md
index 440a4d72..6aeb64a5 100644
--- a/engineering-guide/accounts-and-groups.md
+++ b/engineering-guide/accounts-and-groups.md
@@ -44,7 +44,8 @@ GAC accounts __must not__ be used for administrative tasks (also see: AW-95-17-0
   | 0 - 1000                | 100 - 1000              | local users / groups manually |
   | 1000 - 9999             | 110 - 9999              | old AD accounts manually |
   | 10000 - 29999           | 10000 - 29999           | e-accounts / p-groups Experiment prov. tool |
-  | 30000 - 65534           | 30000 - 65534           | new AD users / groups /external AD accounts OM |
+  | 30000 - 61183           | 30000 - 61183           | new AD users / groups /external AD accounts OM |
+  | 61184–65519             | 61184–65519             | [systemd Dynamic Users](https://0pointer.net/blog/dynamic-users-with-systemd.html) |
   | 70000 - 120000          | 70000 - 120000          | e-accounts / p-groups Experiment prov. tool |
   | 123458 - 150000         | -10000 - -4294967296    | local AFS users / groups AFS |
   | 200000 - 400000         | 200000 - 400000         | new AD users / groups /external AD accounts IAM |