diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs
index a67afb20..dc9ad1c4 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs
@@ -349,6 +349,9 @@ if (hasAdmin)
     builder.Services.AddOtOpcUaAdminClients();
 }
 
+// Registered unconditionally: driver-role nodes resolve Layer-B DriverConfig secrets and have no auth/DP/AdminUI.
+builder.Services.AddZbSecrets(builder.Configuration, "Secrets");
+
 builder.Services.AddOtOpcUaHealth();
 builder.Services.AddOtOpcUaObservability(builder.Configuration);