Index: /trunk/src/VBox/Main/src-client/GuestSessionImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/GuestSessionImpl.cpp	(revision 71786)
+++ /trunk/src/VBox/Main/src-client/GuestSessionImpl.cpp	(revision 71787)
@@ -2606,5 +2606,12 @@
 
     if (fFlags)
-        return setError(E_NOTIMPL, tr("Flag(s) not yet implemented"));
+    {
+        if (   !(fFlags & FileCopyFlag_NoReplace)
+            && !(fFlags & FileCopyFlag_FollowLinks)
+            && !(fFlags & FileCopyFlag_Update))
+        {
+            return setError(E_NOTIMPL, tr("Invalid / not (yet) implemented flag(s) specified"));
+        }
+    }
 
     HRESULT hrc = i_isReadyExternal();
@@ -2686,5 +2693,12 @@
 
     if (fFlags)
-        return setError(E_NOTIMPL, tr("Flag(s) not yet implemented"));
+    {
+        if (   !(fFlags & FileCopyFlag_NoReplace)
+            && !(fFlags & FileCopyFlag_FollowLinks)
+            && !(fFlags & FileCopyFlag_Update))
+        {
+            return setError(E_NOTIMPL, tr("Invalid / not (yet) implemented flag(s) specified"));
+        }
+    }
 
     HRESULT hrc = i_isReadyExternal();