diff --git a/pveum.adoc b/pveum.adoc
index 71ea7ef..5feb2c2 100644
--- a/pveum.adoc
+++ b/pveum.adoc
@@ -56,6 +56,11 @@ Each user entry in this file contains the following information:
 * Whether this user is enabled or disabled
 * Optional two-factor authentication keys
 
+CAUTION: After disabling or deleting a user, this user will not be able to
+log in to new sessions or start new tasks. All tasks which already have
+been started by this user (for example terminal sessions) will **not** be
+terminated automatically.
+
 
 System administrator
 ~~~~~~~~~~~~~~~~~~~~