diff --git a/fetchupd.php b/fetchupd.php
index 69fa50a..c246a4a 100644
--- a/fetchupd.php
+++ b/fetchupd.php
@@ -283,7 +283,8 @@ function parseFetchUpdate($updateInfo, $out, $arch, $ring, $flight, $build, $sku
         return array('error' => 'BROKEN_UPDATE');
     }
 
-    if(preg_match('/Corpnet Required/i', $updateTitle)) {
+    $isCorpnet = preg_match('/Corpnet Required/i', $updateTitle);
+    if($isCorpnet && !uupApiConfigIsTrue('allow_corpnet')) {
         consoleLogger('Skipping corpnet only update...');
         return array('error' => 'CORPNET_ONLY_UPDATE');
     }
diff --git a/shared/main.php b/shared/main.php
index 1bb826c..baca341 100644
--- a/shared/main.php
+++ b/shared/main.php
@@ -16,7 +16,7 @@ limitations under the License.
 */
 
 function uupApiVersion() {
-    return '1.38.0';
+    return '1.39.0';
 }
 
 require_once dirname(__FILE__).'/auths.php';
diff --git a/shared/requests.php b/shared/requests.php
index a40977d..aa89595 100644
--- a/shared/requests.php
+++ b/shared/requests.php
@@ -184,6 +184,10 @@ function composeDeviceAttributes($flight, $ring, $build, $arch, $sku, $type) {
         'WuClientVer='.$build,
     );
 
+    if($ring == 'MSIT' && uupApiConfigIsTrue('allow_corpnet')) {
+        $attrib[] = 'DUInternal=1';
+    }
+
     return htmlentities('E:'.implode('&', $attrib));
 }
 
@@ -402,6 +406,9 @@ function composeFetchUpdRequest($device, $encData, $arch, $flight, $ring, $build
         $type
     );
 
+    $syncCurrent = uupApiConfigIsTrue('fetch_sync_current_only');
+    $syncCurrentStr = $syncCurrent ? 'true' : 'false';
+
     return <<<XML
 <s:Envelope xmlns:a="http://www.w3.org/2005/08/addressing" xmlns:s="http://www.w3.org/2003/05/soap-envelope">
     <s:Header>
@@ -523,7 +530,7 @@ function composeFetchUpdRequest($device, $encData, $arch, $flight, $ring, $build
                 </ExtendedUpdateInfoParameters>
                 <ClientPreferredLanguages/>
                 <ProductsParameters>
-                    <SyncCurrentVersionOnly>false</SyncCurrentVersionOnly>
+                    <SyncCurrentVersionOnly>$syncCurrentStr</SyncCurrentVersionOnly>
                     <DeviceAttributes>$deviceAttributes</DeviceAttributes>
                     <CallerAttributes>$callerAttrib</CallerAttributes>
                     <Products>$products</Products>
diff --git a/shared/utils.php b/shared/utils.php
index 8c9c1cb..b3b4c3a 100644
--- a/shared/utils.php
+++ b/shared/utils.php
@@ -179,3 +179,16 @@ function uupApiReadJson($path) {
 function uupApiWriteJson($path, $data) {
     return file_put_contents($path, json_encode($data)."\n");
 }
+
+function uupApiPacksExist($updateId) {
+    return file_exists('packs/'.$updateId.'.json.gz');
+}
+
+function uupApiConfigIsTrue($config) {
+    $data = uupDumpApiGetConfig();
+
+    if(!isset($data[$config]))
+        return false;
+
+    return $data[$config] == true;
+}