diff --git a/packages/org.eclipse.epp.package.committers.feature/epp.website.xml b/packages/org.eclipse.epp.package.committers.feature/epp.website.xml
index 90dab61e..484c8290 100644
--- a/packages/org.eclipse.epp.package.committers.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.committers.feature/epp.website.xml
@@ -34,6 +34,6 @@ Click <a href="https://bugs.eclipse.org/bugs/enter_bug.cgi?product=EGit">here</a
   </MoreInfo>
 
   <!-- name, the name of the product, used in naming the created files. -->
-  <product name="eclipse-committers-2023-09-M3" />
+  <product name="eclipse-committers-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.cpp.feature/epp.website.xml b/packages/org.eclipse.epp.package.cpp.feature/epp.website.xml
index db1650c4..63e560ba 100644
--- a/packages/org.eclipse.epp.package.cpp.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.cpp.feature/epp.website.xml
@@ -22,6 +22,6 @@
   </packageMetaData>
 
   <!-- name, the name of the product, used in naming the created files. -->
-  <product name="eclipse-cpp-2023-09-M3" />
+  <product name="eclipse-cpp-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.dsl.feature/epp.website.xml b/packages/org.eclipse.epp.package.dsl.feature/epp.website.xml
index b43a4446..905b824c 100644
--- a/packages/org.eclipse.epp.package.dsl.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.dsl.feature/epp.website.xml
@@ -27,6 +27,6 @@
   </MoreInfo>
 
   <!-- name, the name of the product, used in naming the created files. -->
-  <product name="eclipse-dsl-2023-09-M3" />
+  <product name="eclipse-dsl-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.embedcpp.feature/epp.website.xml b/packages/org.eclipse.epp.package.embedcpp.feature/epp.website.xml
index d5ecd341..5fa8b992 100644
--- a/packages/org.eclipse.epp.package.embedcpp.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.embedcpp.feature/epp.website.xml
@@ -29,6 +29,6 @@ To avoid compatibility issues with pre 6.x plug-ins, it is recommended to <b>cre
   </packageMetaData>
 
   <!-- name, the name of the product, used in naming the created files. -->
-  <product name="eclipse-embedcpp-2023-09-M3" />
+  <product name="eclipse-embedcpp-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.java.feature/epp.website.xml b/packages/org.eclipse.epp.package.java.feature/epp.website.xml
index f40b1e99..5505e14c 100644
--- a/packages/org.eclipse.epp.package.java.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.java.feature/epp.website.xml
@@ -28,6 +28,6 @@
 
 
 	<!-- name, the name of the product, used in naming the created files. -->
-	<product name="eclipse-java-2023-09-M3" />
+	<product name="eclipse-java-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.jee.feature/epp.website.xml b/packages/org.eclipse.epp.package.jee.feature/epp.website.xml
index 4344e2be..2c0848e1 100644
--- a/packages/org.eclipse.epp.package.jee.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.jee.feature/epp.website.xml
@@ -35,6 +35,6 @@ Click <a href="https://github.com/eclipse/wildwebdeveloper/issues">here</a> to r
   </MoreInfo>
 
   <!-- name, the name of the product, used in naming the created files. -->
-  <product name="eclipse-jee-2023-09-M3" />
+  <product name="eclipse-jee-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.modeling.feature/epp.website.xml b/packages/org.eclipse.epp.package.modeling.feature/epp.website.xml
index 83362320..a412b304 100644
--- a/packages/org.eclipse.epp.package.modeling.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.modeling.feature/epp.website.xml
@@ -32,6 +32,6 @@
   </MoreInfo>
 
   <!-- name, the name of the product, used in naming the created files. -->
-  <product name="eclipse-modeling-2023-09-M3" />
+  <product name="eclipse-modeling-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.parallel.feature/epp.website.xml b/packages/org.eclipse.epp.package.parallel.feature/epp.website.xml
index 2202b7ee..ec277786 100644
--- a/packages/org.eclipse.epp.package.parallel.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.parallel.feature/epp.website.xml
@@ -30,6 +30,6 @@
   </MoreInfo>
 
 	<!-- name, the name of the product, used in naming the created files. -->
-	<product name="eclipse-parallel-2023-09-M3" />
+	<product name="eclipse-parallel-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.php.feature/epp.website.xml b/packages/org.eclipse.epp.package.php.feature/epp.website.xml
index 7f52b49d..b294dfe5 100644
--- a/packages/org.eclipse.epp.package.php.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.php.feature/epp.website.xml
@@ -35,6 +35,6 @@ Click <a href="https://github.com/eclipse/wildwebdeveloper/issues">here</a> to r
   </MoreInfo>
 
   <!-- name, the name of the product, used in naming the created files. -->
-  <product name="eclipse-php-2023-09-M3" />
+  <product name="eclipse-php-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.rcp.feature/epp.website.xml b/packages/org.eclipse.epp.package.rcp.feature/epp.website.xml
index cfdaace2..a7b04605 100644
--- a/packages/org.eclipse.epp.package.rcp.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.rcp.feature/epp.website.xml
@@ -27,6 +27,6 @@
   </MoreInfo>
 
   <!-- name, the name of the product, used in naming the created files. -->
-  <product name="eclipse-rcp-2023-09-M3" />
+  <product name="eclipse-rcp-2023-09-RC1" />
 
 </configuration>
diff --git a/packages/org.eclipse.epp.package.scout.feature/epp.website.xml b/packages/org.eclipse.epp.package.scout.feature/epp.website.xml
index e76b2ea0..3dcbc49b 100644
--- a/packages/org.eclipse.epp.package.scout.feature/epp.website.xml
+++ b/packages/org.eclipse.epp.package.scout.feature/epp.website.xml
@@ -23,7 +23,7 @@
   </packageMetaData>
   <MoreInfo>
   <NewAndNoteworthy
-    url="https://eclipsescout.github.io/11.0/release-notes.html"
+    url="https://eclipsescout.github.io/scout-docs/23.2/releasenotes/release-notes.html"
     project="Eclipse Scout" />
   <NewAndNoteworthy
     url="https://www.eclipse.org/eclipse/news/4.29/"
@@ -31,6 +31,6 @@
   </MoreInfo>
 
   <!-- name, the name of the product, used in naming the created files. -->
-  <product name="eclipse-scout-2023-09-M3" />
+  <product name="eclipse-scout-2023-09-RC1" />
 
 </configuration>
diff --git a/releng/org.eclipse.epp.config/parent/pom.xml b/releng/org.eclipse.epp.config/parent/pom.xml
index 8693d7f8..0e07e00b 100644
--- a/releng/org.eclipse.epp.config/parent/pom.xml
+++ b/releng/org.eclipse.epp.config/parent/pom.xml
@@ -37,13 +37,13 @@
     <!-- Name of the release (no milestone) -->
     <RELEASE_NAME>2023-09</RELEASE_NAME>
     <!-- Name of the milestone -->
-    <RELEASE_MILESTONE>M3</RELEASE_MILESTONE>
+    <RELEASE_MILESTONE>RC1</RELEASE_MILESTONE>
     <!-- Version of the release -->
     <RELEASE_VERSION>4.29.0</RELEASE_VERSION>
     <!-- Name release directory on download.eclipse.org -->
-    <RELEASE_DIR>202308241200</RELEASE_DIR>
+    <RELEASE_DIR>202308311200</RELEASE_DIR>
     <!-- SimRel Repo to build from -->
-    <SIMREL_REPO>https://download.eclipse.org/staging/2023-09/</SIMREL_REPO>
+    <SIMREL_REPO>https://download.eclipse.org/releases/2023-09/202309011000/</SIMREL_REPO>
     <!-- ID used to generate the filename of the packages -->
     <eclipse.simultaneous.release.id>${RELEASE_NAME}-${RELEASE_MILESTONE}</eclipse.simultaneous.release.id>
     <!-- Timestamp used in various places, e.g. the about dialog (see about.mappings) -->