diff --git a/configure b/configure
index d263b46594e..73d9d7ef82b 100755
--- a/configure
+++ b/configure
@@ -20106,6 +20106,7 @@ wine_fn_config_makefile dlls/acledit enable_acledit
 wine_fn_config_makefile dlls/aclui enable_aclui
 wine_fn_config_makefile dlls/activeds.tlb enable_activeds_tlb
 wine_fn_config_makefile dlls/activeds enable_activeds
+wine_fn_config_makefile dlls/activeds/tests enable_tests
 wine_fn_config_makefile dlls/actxprxy enable_actxprxy
 wine_fn_config_makefile dlls/adsiid enable_adsiid
 wine_fn_config_makefile dlls/adsldp enable_adsldp
diff --git a/configure.ac b/configure.ac
index 9770be795c0..3e4b05816da 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2806,6 +2806,7 @@ WINE_CONFIG_MAKEFILE(dlls/acledit)
 WINE_CONFIG_MAKEFILE(dlls/aclui)
 WINE_CONFIG_MAKEFILE(dlls/activeds.tlb)
 WINE_CONFIG_MAKEFILE(dlls/activeds)
+WINE_CONFIG_MAKEFILE(dlls/activeds/tests)
 WINE_CONFIG_MAKEFILE(dlls/actxprxy)
 WINE_CONFIG_MAKEFILE(dlls/adsiid)
 WINE_CONFIG_MAKEFILE(dlls/adsldp)
diff --git a/dlls/activeds/activeds_main.c b/dlls/activeds/activeds_main.c
index 6a825f09131..1b22da67653 100644
--- a/dlls/activeds/activeds_main.c
+++ b/dlls/activeds/activeds_main.c
@@ -101,10 +101,44 @@ HRESULT WINAPI ADsEnumerateNext(IEnumVARIANT* pEnumVariant, ULONG cElements, VAR
 /*****************************************************
  * ADsBuildVarArrayStr     [ACTIVEDS.7]
  */
-HRESULT WINAPI ADsBuildVarArrayStr(LPWSTR *lppPathNames, DWORD dwPathNames, VARIANT* pvar)
+HRESULT WINAPI ADsBuildVarArrayStr(LPWSTR *str, DWORD count, VARIANT *var)
 {
-    FIXME("(%p, %d, %p)!stub\n",*lppPathNames, dwPathNames, pvar);
-    return E_NOTIMPL;
+    HRESULT hr;
+    SAFEARRAY *sa;
+    LONG idx, end = count;
+
+    TRACE("(%p, %u, %p)\n", str, count, var);
+
+    if (!var) return E_ADS_BAD_PARAMETER;
+
+    sa = SafeArrayCreateVector(VT_VARIANT, 0, count);
+    if (!sa) return E_OUTOFMEMORY;
+
+    VariantInit(var);
+    for (idx = 0; idx < end; idx++)
+    {
+        VARIANT item;
+
+        V_VT(&item) = VT_BSTR;
+        V_BSTR(&item) = SysAllocString(str[idx]);
+        if (!V_BSTR(&item))
+        {
+            hr = E_OUTOFMEMORY;
+            goto fail;
+        }
+
+        hr = SafeArrayPutElement(sa, &idx, &item);
+        SysFreeString(V_BSTR(&item));
+        if (hr != S_OK) goto fail;
+    }
+
+    V_VT(var) = VT_ARRAY | VT_VARIANT;
+    V_ARRAY(var) = sa;
+    return S_OK;
+
+fail:
+    SafeArrayDestroy(sa);
+    return hr;
 }
 
 /*****************************************************
diff --git a/dlls/activeds/tests/Makefile.in b/dlls/activeds/tests/Makefile.in
new file mode 100644
index 00000000000..25ae2a9bfd2
--- /dev/null
+++ b/dlls/activeds/tests/Makefile.in
@@ -0,0 +1,5 @@
+TESTDLL   = activeds.dll
+IMPORTS   = ole32 oleaut32 activeds
+
+C_SRCS = \
+	activeds.c
diff --git a/dlls/activeds/tests/activeds.c b/dlls/activeds/tests/activeds.c
new file mode 100644
index 00000000000..6f469f9dc16
--- /dev/null
+++ b/dlls/activeds/tests/activeds.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2020 Dmitry Timoshkov
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+
+#include "windef.h"
+#include "winbase.h"
+#include "objbase.h"
+#include "iads.h"
+#include "adshlp.h"
+#include "adserr.h"
+
+#include "wine/test.h"
+
+static void test_ADsBuildVarArrayStr(void)
+{
+    const WCHAR *props[] = { L"prop1", L"prop2" };
+    HRESULT hr;
+    VARIANT var, item, *data;
+    LONG start, end, idx;
+
+    hr = ADsBuildVarArrayStr(NULL, 0, NULL);
+    ok(hr == E_ADS_BAD_PARAMETER || hr == E_FAIL /* XP */, "got %#x\n", hr);
+
+    hr = ADsBuildVarArrayStr(NULL, 0, &var);
+    ok(hr == S_OK, "got %#x\n", hr);
+    ok(V_VT(&var) == (VT_ARRAY | VT_VARIANT), "got %d\n", V_VT(&var));
+    start = 0xdeadbeef;
+    hr = SafeArrayGetLBound(V_ARRAY(&var), 1, &start);
+    ok(hr == S_OK, "got %#x\n", hr);
+    ok(start == 0, "got %d\n", start);
+    end = 0xdeadbeef;
+    hr = SafeArrayGetUBound(V_ARRAY(&var), 1, &end);
+    ok(hr == S_OK, "got %#x\n", hr);
+    ok(end == -1, "got %d\n", end);
+    VariantClear(&var);
+
+    hr = ADsBuildVarArrayStr((LPWSTR *)props, ARRAY_SIZE(props), &var);
+    ok(hr == S_OK, "got %#x\n", hr);
+    ok(V_VT(&var) == (VT_ARRAY | VT_VARIANT), "got %d\n", V_VT(&var));
+    start = 0xdeadbeef;
+    hr = SafeArrayGetLBound(V_ARRAY(&var), 1, &start);
+    ok(hr == S_OK, "got %#x\n", hr);
+    ok(start == 0, "got %d\n", start);
+    end = 0xdeadbeef;
+    hr = SafeArrayGetUBound(V_ARRAY(&var), 1, &end);
+    ok(hr == S_OK, "got %#x\n", hr);
+    ok(end == 1, "got %d\n", end);
+    idx = 0;
+    hr = SafeArrayGetElement(V_ARRAY(&var), &idx, &item);
+    ok(hr == S_OK, "got %#x\n", hr);
+    ok(V_VT(&item) == VT_BSTR, "got %d\n", V_VT(&item));
+    ok(!lstrcmpW(V_BSTR(&item), L"prop1"), "got %s\n", wine_dbgstr_w(V_BSTR(&item)));
+    VariantClear(&item);
+    hr = SafeArrayAccessData(V_ARRAY(&var), (void *)&data);
+    ok(hr == S_OK, "got %#x\n", hr);
+    ok(V_VT(&data[0]) == VT_BSTR, "got %d\n", V_VT(&data[0]));
+    ok(!lstrcmpW(V_BSTR(&data[0]), L"prop1"), "got %s\n", wine_dbgstr_w(V_BSTR(&data[0])));
+    ok(V_VT(&data[0]) == VT_BSTR, "got %d\n", V_VT(&data[0]));
+    ok(!lstrcmpW(V_BSTR(&data[1]), L"prop2"), "got %s\n", wine_dbgstr_w(V_BSTR(&data[1])));
+    hr = SafeArrayUnaccessData(V_ARRAY(&var));
+    ok(hr == S_OK, "got %#x\n", hr);
+    VariantClear(&var);
+}
+
+START_TEST(activeds)
+{
+    test_ADsBuildVarArrayStr();
+}
diff --git a/include/adshlp.h b/include/adshlp.h
index a574e5061f3..0b08c1a99c3 100644
--- a/include/adshlp.h
+++ b/include/adshlp.h
@@ -24,6 +24,7 @@ extern "C" {
 #endif
 
 HRESULT WINAPI ADsBuildEnumerator(IADsContainer*,IEnumVARIANT**);
+HRESULT WINAPI ADsBuildVarArrayStr(LPWSTR*,DWORD,VARIANT*);
 HRESULT WINAPI ADsEnumerateNext(IEnumVARIANT*,ULONG,VARIANT*,ULONG*);
 HRESULT WINAPI ADsGetObject(LPCWSTR,REFIID,VOID**);
 HRESULT WINAPI ADsOpenObject(LPCWSTR,LPCWSTR,LPCWSTR,DWORD,REFIID,VOID**);