diff --git a/dlls/msxml3/dispex.c b/dlls/msxml3/dispex.c
index a080a8bbfad..d0520f35778 100644
--- a/dlls/msxml3/dispex.c
+++ b/dlls/msxml3/dispex.c
@@ -86,20 +86,6 @@ struct dispex_data_t {
     struct list entry;
 };
 
-typedef struct {
-    VARIANT var;
-    LPWSTR name;
-} dynamic_prop_t;
-
-struct dispex_dynamic_data_t {
-    DWORD buf_size;
-    DWORD prop_cnt;
-    dynamic_prop_t *props;
-};
-
-#define DISPID_DYNPROP_0    0x50000000
-#define DISPID_DYNPROP_MAX  0x5fffffff
-
 static struct list dispex_data_list = LIST_INIT(dispex_data_list);
 static ITypeLib *typelib[LibXml_Last];
 static ITypeInfo *typeinfos[LAST_tid];
@@ -341,11 +327,6 @@ static dispex_data_t *get_dispex_data(DispatchEx *This)
     return This->data->data;
 }
 
-static inline BOOL is_dynamic_dispid(DISPID id)
-{
-    return DISPID_DYNPROP_0 <= id && id <= DISPID_DYNPROP_MAX;
-}
-
 static inline DispatchEx *impl_from_IDispatchEx(IDispatchEx *iface)
 {
     return CONTAINING_RECORD(iface, DispatchEx, IDispatchEx_iface);
@@ -461,17 +442,6 @@ static HRESULT WINAPI DispatchEx_GetDispID(IDispatchEx *iface, BSTR bstrName, DW
             min = n+1;
     }
 
-    if(This->dynamic_data) {
-        unsigned i;
-
-        for(i=0; i < This->dynamic_data->prop_cnt; i++) {
-            if(!strcmpW(This->dynamic_data->props[i].name, bstrName)) {
-                *pid = DISPID_DYNPROP_0 + i;
-                return S_OK;
-            }
-        }
-    }
-
     if(This->data->vtbl && This->data->vtbl->get_dispid) {
         HRESULT hres;
 
@@ -480,42 +450,6 @@ static HRESULT WINAPI DispatchEx_GetDispID(IDispatchEx *iface, BSTR bstrName, DW
             return hres;
     }
 
-    if(grfdex & fdexNameEnsure) {
-        dispex_dynamic_data_t *dynamic_data;
-
-        TRACE("creating dynamic prop %s\n", debugstr_w(bstrName));
-
-        if(This->dynamic_data) {
-            dynamic_data = This->dynamic_data;
-        }else {
-            dynamic_data = This->dynamic_data = heap_alloc_zero(sizeof(dispex_dynamic_data_t));
-            if(!dynamic_data)
-                return E_OUTOFMEMORY;
-        }
-
-        if(!dynamic_data->buf_size) {
-            dynamic_data->props = heap_alloc(sizeof(dynamic_prop_t)*4);
-            if(!dynamic_data->props)
-                return E_OUTOFMEMORY;
-            dynamic_data->buf_size = 4;
-        }else if(dynamic_data->buf_size == dynamic_data->prop_cnt) {
-            dynamic_prop_t *new_props;
-
-            new_props = heap_realloc(dynamic_data->props, sizeof(dynamic_prop_t)*(dynamic_data->buf_size<<1));
-            if(!new_props)
-                return E_OUTOFMEMORY;
-
-            dynamic_data->props = new_props;
-            dynamic_data->buf_size <<= 1;
-        }
-
-        dynamic_data->props[dynamic_data->prop_cnt].name = heap_strdupW(bstrName);
-        VariantInit(&dynamic_data->props[dynamic_data->prop_cnt].var);
-        *pid = DISPID_DYNPROP_0 + dynamic_data->prop_cnt++;
-
-        return S_OK;
-    }
-
     TRACE("not found %s\n", debugstr_w(bstrName));
     return DISP_E_UNKNOWNNAME;
 }
@@ -567,28 +501,6 @@ static HRESULT WINAPI DispatchEx_InvokeEx(IDispatchEx *iface, DISPID id, LCID lc
         return E_NOTIMPL;
     }
 
-    if(is_dynamic_dispid(id)) {
-        DWORD idx = id - DISPID_DYNPROP_0;
-        VARIANT *var;
-
-        if(!This->dynamic_data || This->dynamic_data->prop_cnt <= idx)
-            return DISP_E_UNKNOWNNAME;
-
-        var = &This->dynamic_data->props[idx].var;
-
-        switch(wFlags) {
-        case INVOKE_PROPERTYGET:
-            V_VT(pvarRes) = VT_EMPTY;
-            return VariantCopy(pvarRes, var);
-        case INVOKE_PROPERTYPUT:
-            VariantClear(var);
-            return VariantCopy(var, pdp->rgvarg);
-        default:
-            FIXME("unhandled wFlags %x\n", wFlags);
-            return E_NOTIMPL;
-        }
-    }
-
     data = get_dispex_data(This);
     if(!data)
         return E_FAIL;
@@ -726,26 +638,9 @@ BOOL dispex_query_interface(DispatchEx *This, REFIID riid, void **ppv)
     return TRUE;
 }
 
-void release_dispex(DispatchEx *This)
-{
-    dynamic_prop_t *prop;
-
-    if(!This->dynamic_data)
-        return;
-
-    for(prop = This->dynamic_data->props; prop < This->dynamic_data->props + This->dynamic_data->prop_cnt; prop++) {
-        VariantClear(&prop->var);
-        heap_free(prop->name);
-    }
-
-    heap_free(This->dynamic_data->props);
-    heap_free(This->dynamic_data);
-}
-
 void init_dispex(DispatchEx *dispex, IUnknown *outer, dispex_static_data_t *data)
 {
     dispex->IDispatchEx_iface.lpVtbl = &DispatchExVtbl;
     dispex->outer = outer;
     dispex->data = data;
-    dispex->dynamic_data = NULL;
 }
diff --git a/dlls/msxml3/domimpl.c b/dlls/msxml3/domimpl.c
index 7deb617b309..e286e57d716 100644
--- a/dlls/msxml3/domimpl.c
+++ b/dlls/msxml3/domimpl.c
@@ -101,10 +101,7 @@ static ULONG WINAPI dimimpl_Release(
 
     TRACE("(%p)->(%d)\n", This, ref);
     if ( ref == 0 )
-    {
-        release_dispex(&This->dispex);
         heap_free( This );
-    }
 
     return ref;
 }
diff --git a/dlls/msxml3/msxml_private.h b/dlls/msxml3/msxml_private.h
index d7014b60840..fb7ddd1022a 100644
--- a/dlls/msxml3/msxml_private.h
+++ b/dlls/msxml3/msxml_private.h
@@ -134,7 +134,6 @@ extern HRESULT get_typeinfo(tid_t tid, ITypeInfo **typeinfo) DECLSPEC_HIDDEN;
 extern void release_typelib(void) DECLSPEC_HIDDEN;
 
 typedef struct dispex_data_t dispex_data_t;
-typedef struct dispex_dynamic_data_t dispex_dynamic_data_t;
 
 typedef struct {
     HRESULT (*get_dispid)(IUnknown*,BSTR,DWORD,DISPID*);
@@ -154,7 +153,6 @@ typedef struct {
     IUnknown *outer;
 
     dispex_static_data_t *data;
-    dispex_dynamic_data_t *dynamic_data;
 } DispatchEx;
 
 extern HINSTANCE MSXML_hInstance DECLSPEC_HIDDEN;
diff --git a/dlls/msxml3/mxnamespace.c b/dlls/msxml3/mxnamespace.c
index 14dfdd77324..f114d973445 100644
--- a/dlls/msxml3/mxnamespace.c
+++ b/dlls/msxml3/mxnamespace.c
@@ -460,7 +460,6 @@ static ULONG WINAPI vbnamespacemanager_Release(IVBMXNamespaceManager *iface)
             free_ns_context(ctxt);
         }
 
-        release_dispex(&This->dispex);
         heap_free( This );
     }
 
diff --git a/dlls/msxml3/mxwriter.c b/dlls/msxml3/mxwriter.c
index 6c2eeb857e0..5778345c0ea 100644
--- a/dlls/msxml3/mxwriter.c
+++ b/dlls/msxml3/mxwriter.c
@@ -779,7 +779,6 @@ static ULONG WINAPI mxwriter_Release(IMXWriter *iface)
         SysFreeString(This->encoding);
 
         SysFreeString(This->element);
-        release_dispex(&This->dispex);
         heap_free(This);
     }
 
@@ -2605,7 +2604,6 @@ static ULONG WINAPI MXAttributes_Release(IMXAttributes *iface)
             SysFreeString(This->attr[i].value);
         }
 
-        release_dispex(&This->dispex);
         heap_free(This->attr);
         heap_free(This);
     }
diff --git a/dlls/msxml3/node.c b/dlls/msxml3/node.c
index 8b067b6dc3e..aee38e08951 100644
--- a/dlls/msxml3/node.c
+++ b/dlls/msxml3/node.c
@@ -1198,7 +1198,6 @@ void destroy_xmlnode(xmlnode *This)
         xmlnode_release(This->node);
         xmldoc_release(This->node->doc);
     }
-    release_dispex(&This->dispex);
 }
 
 void init_xmlnode(xmlnode *This, xmlNodePtr node, IXMLDOMNode *node_iface, dispex_static_data_t *dispex_data)
diff --git a/dlls/msxml3/nodemap.c b/dlls/msxml3/nodemap.c
index 94faf9faf81..1eed3d5fcde 100644
--- a/dlls/msxml3/nodemap.c
+++ b/dlls/msxml3/nodemap.c
@@ -142,7 +142,6 @@ static ULONG WINAPI xmlnodemap_Release(
     {
         xmldoc_release( This->node->doc );
         if (This->enumvariant) IEnumVARIANT_Release(This->enumvariant);
-        release_dispex(&This->dispex);
         heap_free( This );
     }
 
diff --git a/dlls/msxml3/parseerror.c b/dlls/msxml3/parseerror.c
index b5c79480d7b..438c9eb3c49 100644
--- a/dlls/msxml3/parseerror.c
+++ b/dlls/msxml3/parseerror.c
@@ -109,7 +109,6 @@ static ULONG WINAPI parseError_Release(
         SysFreeString(This->url);
         SysFreeString(This->reason);
         SysFreeString(This->srcText);
-        release_dispex(&This->dispex);
         heap_free( This );
     }
 
diff --git a/dlls/msxml3/saxreader.c b/dlls/msxml3/saxreader.c
index 3ba1c0c24e9..7a9e410ea38 100644
--- a/dlls/msxml3/saxreader.c
+++ b/dlls/msxml3/saxreader.c
@@ -2934,7 +2934,6 @@ static ULONG WINAPI saxxmlreader_Release(
         SysFreeString(This->xmldecl_version);
         free_bstr_pool(&This->pool);
 
-        release_dispex(&This->dispex);
         heap_free( This );
     }
 
diff --git a/dlls/msxml3/schema.c b/dlls/msxml3/schema.c
index a310b4f91e3..5bfabb30718 100644
--- a/dlls/msxml3/schema.c
+++ b/dlls/msxml3/schema.c
@@ -1149,7 +1149,6 @@ static ULONG WINAPI schema_cache_Release(IXMLDOMSchemaCollection2* iface)
             heap_free(This->uris[i]);
         heap_free(This->uris);
         xmlHashFree(This->cache, cache_free);
-        release_dispex(&This->dispex);
         heap_free(This);
     }
 
diff --git a/dlls/msxml3/selection.c b/dlls/msxml3/selection.c
index bb0f42ecd6f..6a725502513 100644
--- a/dlls/msxml3/selection.c
+++ b/dlls/msxml3/selection.c
@@ -177,7 +177,6 @@ static ULONG WINAPI domselection_Release(
         xmlXPathFreeObject(This->result);
         xmldoc_release(This->node->doc);
         if (This->enumvariant) IEnumVARIANT_Release(This->enumvariant);
-        release_dispex(&This->dispex);
         heap_free(This);
     }
 
diff --git a/dlls/msxml3/stylesheet.c b/dlls/msxml3/stylesheet.c
index 8073dde3498..e5761ded79d 100644
--- a/dlls/msxml3/stylesheet.c
+++ b/dlls/msxml3/stylesheet.c
@@ -138,7 +138,6 @@ static ULONG WINAPI xsltemplate_Release( IXSLTemplate *iface )
     if ( ref == 0 )
     {
         if (This->node) IXMLDOMNode_Release( This->node );
-        release_dispex(&This->dispex);
         heap_free( This );
     }
 
@@ -326,7 +325,6 @@ static ULONG WINAPI xslprocessor_Release( IXSLProcessor *iface )
             xslprocessor_par_free(&This->params, par);
 
         IXSLTemplate_Release(&This->stylesheet->IXSLTemplate_iface);
-        release_dispex(&This->dispex);
         heap_free( This );
     }
 
diff --git a/dlls/msxml3/tests/domdoc.c b/dlls/msxml3/tests/domdoc.c
index 6af47e712ea..b5e744188d8 100644
--- a/dlls/msxml3/tests/domdoc.c
+++ b/dlls/msxml3/tests/domdoc.c
@@ -9734,6 +9734,7 @@ static void test_load(void)
 
 static void test_domobj_dispex(IUnknown *obj)
 {
+    static const WCHAR testW[] = {'t','e','s','t','p','r','o','p',0};
     DISPID dispid = DISPID_XMLDOM_NODELIST_RESET;
     IDispatchEx *dispex;
     IUnknown *unk;
@@ -9771,9 +9772,15 @@ static void test_domobj_dispex(IUnknown *obj)
     hr = IDispatchEx_GetNextDispID(dispex, fdexEnumDefault, DISPID_XMLDOM_NODELIST_RESET, &dispid);
     EXPECT_HR(hr, E_NOTIMPL);
 
+    unk = (IUnknown*)0xdeadbeef;
     hr = IDispatchEx_GetNameSpaceParent(dispex, &unk);
     EXPECT_HR(hr, E_NOTIMPL);
-    if (hr == S_OK && unk) IUnknown_Release(unk);
+    ok(unk == (IUnknown*)0xdeadbeef, "got %p\n", unk);
+
+    name = SysAllocString(testW);
+    hr = IDispatchEx_GetDispID(dispex, name, fdexNameEnsure, &dispid);
+    ok(hr == DISP_E_UNKNOWNNAME, "got 0x%08x\n", hr);
+    SysFreeString(name);
 
     IDispatchEx_Release(dispex);
 }
@@ -10670,6 +10677,13 @@ todo_wine {
     IXSLProcessor_Release(processor);
     IXSLTemplate_Release(template);
 
+    if (is_clsid_supported(&CLSID_DOMDocument60, &IID_IXMLDOMDocument))
+    {
+        doc = create_document_version(60, &IID_IXMLDOMDocument);
+        test_domobj_dispex((IUnknown*)doc);
+        IXMLDOMDocument_Release(doc);
+    }
+
     free_bstrs();
 }
 
diff --git a/dlls/msxml3/tests/saxreader.c b/dlls/msxml3/tests/saxreader.c
index 42e4ec09eb3..c5fcaa767aa 100644
--- a/dlls/msxml3/tests/saxreader.c
+++ b/dlls/msxml3/tests/saxreader.c
@@ -4387,6 +4387,7 @@ static void test_mxwriter_encoding(void)
 
 static void test_obj_dispex(IUnknown *obj)
 {
+    static const WCHAR testW[] = {'t','e','s','t','p','r','o','p',0};
     static const WCHAR starW[] = {'*',0};
     DISPID dispid = DISPID_SAX_XMLREADER_GETFEATURE;
     IDispatchEx *dispex;
@@ -4395,6 +4396,7 @@ static void test_obj_dispex(IUnknown *obj)
     UINT ticnt;
     HRESULT hr;
     BSTR name;
+    DISPID did;
 
     hr = IUnknown_QueryInterface(obj, &IID_IDispatchEx, (void**)&dispex);
     EXPECT_HR(hr, S_OK);
@@ -4425,9 +4427,15 @@ static void test_obj_dispex(IUnknown *obj)
     hr = IDispatchEx_GetNextDispID(dispex, fdexEnumDefault, DISPID_SAX_XMLREADER_GETFEATURE, &dispid);
     EXPECT_HR(hr, E_NOTIMPL);
 
+    unk = (IUnknown*)0xdeadbeef;
     hr = IDispatchEx_GetNameSpaceParent(dispex, &unk);
     EXPECT_HR(hr, E_NOTIMPL);
-    if (hr == S_OK && unk) IUnknown_Release(unk);
+    ok(unk == (IUnknown*)0xdeadbeef, "got %p\n", unk);
+
+    name = SysAllocString(testW);
+    hr = IDispatchEx_GetDispID(dispex, name, fdexNameEnsure, &did);
+    ok(hr == DISP_E_UNKNOWNNAME, "got 0x%08x\n", hr);
+    SysFreeString(name);
 
     IDispatchEx_Release(dispex);
 }
@@ -4491,8 +4499,15 @@ static void test_saxreader_dispex(void)
     ok(hr == S_OK, "got 0x%08x\n", hr);
 
     IVBSAXXMLReader_Release(vbreader);
-
     ISAXXMLReader_Release(reader);
+
+    if (is_clsid_supported(&CLSID_SAXXMLReader60, reader_support_data))
+    {
+        hr = CoCreateInstance(&CLSID_SAXXMLReader60, NULL, CLSCTX_INPROC_SERVER, &IID_IUnknown, (void**)&unk);
+        ok(hr == S_OK, "got 0x%08x\n", hr);
+        test_obj_dispex(unk);
+        IUnknown_Release(unk);
+    }
 }
 
 static void test_mxwriter_dispex(void)
@@ -4512,8 +4527,15 @@ static void test_mxwriter_dispex(void)
     test_obj_dispex(unk);
     IUnknown_Release(unk);
     IDispatchEx_Release(dispex);
-
     IMXWriter_Release(writer);
+
+    if (is_clsid_supported(&CLSID_MXXMLWriter60, mxwriter_support_data))
+    {
+        hr = CoCreateInstance(&CLSID_MXXMLWriter60, NULL, CLSCTX_INPROC_SERVER, &IID_IUnknown, (void**)&unk);
+        ok(hr == S_OK, "got 0x%08x\n", hr);
+        test_obj_dispex(unk);
+        IUnknown_Release(unk);
+    }
 }
 
 static void test_mxwriter_comment(void)
diff --git a/dlls/msxml3/tests/schema.c b/dlls/msxml3/tests/schema.c
index ac3feade2dc..658b0d7f77f 100644
--- a/dlls/msxml3/tests/schema.c
+++ b/dlls/msxml3/tests/schema.c
@@ -1416,6 +1416,7 @@ static void test_validate_on_load(void)
 
 static void test_obj_dispex(IUnknown *obj)
 {
+    static const WCHAR testW[] = {'t','e','s','t','p','r','o','p',0};
     static const WCHAR starW[] = {'*',0};
     DISPID dispid = DISPID_SAX_XMLREADER_GETFEATURE;
     IDispatchEx *dispex;
@@ -1454,9 +1455,15 @@ static void test_obj_dispex(IUnknown *obj)
     hr = IDispatchEx_GetNextDispID(dispex, fdexEnumDefault, DISPID_XMLDOM_SCHEMACOLLECTION_ADD, &dispid);
     EXPECT_HR(hr, E_NOTIMPL);
 
+    unk = (IUnknown*)0xdeadbeef;
     hr = IDispatchEx_GetNameSpaceParent(dispex, &unk);
     EXPECT_HR(hr, E_NOTIMPL);
-    if (hr == S_OK && unk) IUnknown_Release(unk);
+    ok(unk == (IUnknown*)0xdeadbeef, "got %p\n", unk);
+
+    name = SysAllocString(testW);
+    hr = IDispatchEx_GetDispID(dispex, name, fdexNameEnsure, &dispid);
+    ok(hr == DISP_E_UNKNOWNNAME, "got 0x%08x\n", hr);
+    SysFreeString(name);
 
     IDispatchEx_Release(dispex);
 }
@@ -1496,8 +1503,14 @@ static void test_dispex(void)
     ok(V_DISPATCH(&ret) == (void*)0x1, "got %p\n", V_DISPATCH(&ret));
 
     IDispatchEx_Release(dispex);
-
     IXMLDOMSchemaCollection_Release(cache);
+
+    cache = create_cache_version(60, &IID_IXMLDOMSchemaCollection);
+    if (cache)
+    {
+        test_obj_dispex((IUnknown*)cache);
+        IXMLDOMSchemaCollection_Release(cache);
+    }
 }
 
 static void test_get(void)