diff --git a/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.c b/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.c
index 0540e6fa8a..3bc13d3407 100644
--- a/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.c
+++ b/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.c
@@ -892,6 +892,13 @@ DeviceManagerUiLibConstructor (
                   );
   ASSERT (gDeviceManagerPrivate.HiiHandle != NULL);
 
+  //
+  // The device manager form contains a page listing all the network
+  // controllers in the system. This list can only be populated if all
+  // handles have been connected, so do it here.
+  //
+  EfiBootManagerConnectAll ();
+
   //
   // Update boot manager page
   //
diff --git a/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.h b/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.h
index 22fe12d2a5..c53c2a1a0e 100644
--- a/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.h
+++ b/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManager.h
@@ -23,6 +23,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #include <Library/BaseLib.h>
 #include <Library/HiiLib.h>
 #include <Library/DevicePathLib.h>
+#include <Library/UefiBootManagerLib.h>
 #include <Library/UefiHiiServicesLib.h>
 
 //
diff --git a/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManagerUiLib.inf b/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManagerUiLib.inf
index cb01b3b851..d7f833d8b2 100644
--- a/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManagerUiLib.inf
+++ b/MdeModulePkg/Library/DeviceManagerUiLib/DeviceManagerUiLib.inf
@@ -40,6 +40,7 @@
   DebugLib
   PrintLib
   HiiLib
+  UefiBootManagerLib
   UefiHiiServicesLib
 
 [Guids]