diff --git a/configure.ac b/configure.ac
index 838566e..de7c5b7 100755
--- a/configure.ac
+++ b/configure.ac
@@ -55,6 +55,9 @@
 AS_IF([test "x$SOFTWARE_OBJPATH" == "x"], [SOFTWARE_OBJPATH="/xyz/openbmc_project/software"])
 AC_DEFINE_UNQUOTED([SOFTWARE_OBJPATH], ["$SOFTWARE_OBJPATH"], [The software manager Dbus root])
 
+AC_DEFINE(VERSION_IFACE, "xyz.openbmc_project.Software.Version",
+    [The software version manager interface])
+
 AC_DEFINE(BUSNAME_UPDATER, "org.open_power.Software.Host.Updater",
     [The item updater DBus busname to own.])
 
@@ -62,6 +65,13 @@
 AS_IF([test "x$TOC_FILE" == "x"], [TOC_FILE="/tmp/pnor/pnor.toc"])
 AC_DEFINE_UNQUOTED([TOC_FILE], ["$TOC_FILE"], [The path to the pnor toc file])
 
+AC_DEFINE(MAPPER_BUSNAME, "xyz.openbmc_project.ObjectMapper",
+    [The object mapper busname.])
+AC_DEFINE(MAPPER_PATH, "/xyz/openbmc_project/object_mapper",
+    [The object mapper path.])
+AC_DEFINE(MAPPER_INTERFACE, "xyz.openbmc_project.ObjectMapper",
+    [The object mapper interface.])
+
 AC_CONFIG_FILES([Makefile test/Makefile])
 AC_OUTPUT
 
diff --git a/item_updater.cpp b/item_updater.cpp
index 9614f50..77dfe1c 100755
--- a/item_updater.cpp
+++ b/item_updater.cpp
@@ -1,3 +1,4 @@
+#include <phosphor-logging/log.hpp>
 #include "config.h"
 #include "item_updater.hpp"
 
@@ -8,17 +9,62 @@
 namespace manager
 {
 
+using namespace phosphor::logging;
+
 int ItemUpdater::createActivation(sd_bus_message* msg,
                                   void* userData,
                                   sd_bus_error* retErr)
 {
-    auto versionId = 1;
     auto* updater = static_cast<ItemUpdater*>(userData);
-    updater->activations.insert(std::make_pair(
-            versionId,
-            std::make_unique<Activation>(
-                    updater->busItem,
-                    SOFTWARE_OBJPATH)));
+    auto mapper = updater->busItem.new_method_call(
+            MAPPER_BUSNAME,
+            MAPPER_PATH,
+            MAPPER_INTERFACE,
+            "GetSubTreePaths");
+    mapper.append(SOFTWARE_OBJPATH,
+                  1, // Depth
+                  std::vector<std::string>({VERSION_IFACE}));
+
+    auto mapperResponseMsg = updater->busItem.call(mapper);
+    if (mapperResponseMsg.is_method_error())
+    {
+        log<level::ERR>("Error in mapper call",
+                        entry("PATH=%s", SOFTWARE_OBJPATH),
+                        entry("INTERFACE=%s", VERSION_IFACE));
+        return -1;
+    }
+
+    std::vector<std::string> mapperResponse;
+    mapperResponseMsg.read(mapperResponse);
+    if (mapperResponse.empty())
+    {
+        log<level::ERR>("Error reading mapper response",
+                        entry("PATH=%s", SOFTWARE_OBJPATH),
+                        entry("INTERFACE=%s", VERSION_IFACE));
+        return -1;
+    }
+
+    for (const auto& resp : mapperResponse)
+    {
+        // Version id is the last item in the path
+        auto pos = resp.rfind("/");
+        if (pos == std::string::npos)
+        {
+            log<level::ERR>("No version id found in object path",
+                    entry("OBJPATH=%s", resp));
+            return -1;
+        }
+
+        auto versionId = std::stoi(resp.substr(pos + 1), nullptr, 16);
+        if (updater->activations.find(versionId) == updater->activations.end())
+        {
+            updater->activations.insert(std::make_pair(
+                    versionId,
+                    std::make_unique<Activation>(
+                            updater->busItem,
+                            resp)));
+        }
+    }
     return 0;
 }