advapi32: Fix error code when calling LsaOpenPolicy for non existing remote machine.

dlls/advapi32/lsa.c

@@ -739,7 +739,7 @@ NTSTATUS WINAPI LsaOpenPolicy(
           ObjectAttributes, DesiredAccess, PolicyHandle);
 
     ADVAPI_ForceLocalComputer(SystemName ? SystemName->Buffer : NULL,
-                              STATUS_ACCESS_VIOLATION);
+                              RPC_NT_SERVER_UNAVAILABLE);
     dumpLsaAttributes(ObjectAttributes);
 
     if(PolicyHandle) *PolicyHandle = (LSA_HANDLE)0xcafe;

dlls/advapi32/tests/lsa.c

@@ -43,6 +43,8 @@ static NTSTATUS (WINAPI *pLsaGetUserName)(PUNICODE_STRING *user, PUNICODE_STRING
 
 static void test_lsa(void)
 {
+    static WCHAR machineW[] = {'W','i','n','e','N','o','M','a','c','h','i','n','e',0};
+    LSA_UNICODE_STRING machine;
     NTSTATUS status;
     LSA_HANDLE handle;
     LSA_OBJECT_ATTRIBUTES object_attributes;
@@ -50,6 +52,14 @@ static void test_lsa(void)
     ZeroMemory(&object_attributes, sizeof(object_attributes));
     object_attributes.Length = sizeof(object_attributes);
 
+    machine.Buffer = machineW;
+    machine.Length = sizeof(machineW) - 2;
+    machine.MaximumLength = sizeof(machineW);
+
+    status = LsaOpenPolicy( &machine, &object_attributes, POLICY_LOOKUP_NAMES, &handle);
+    ok(status == RPC_NT_SERVER_UNAVAILABLE,
+       "LsaOpenPolicy(POLICY_LOOKUP_NAMES) for invalid machine returned 0x%08x\n", status);
+
     status = LsaOpenPolicy( NULL, &object_attributes, POLICY_ALL_ACCESS, &handle);
     ok(status == STATUS_SUCCESS || status == STATUS_ACCESS_DENIED,
        "LsaOpenPolicy(POLICY_ALL_ACCESS) returned 0x%08lx\n", status);