diff --git a/edc-extensions/iatp/tx-iatp-sts-dim/src/main/java/org/eclipse/tractusx/edc/iam/iatp/sts/dim/DimStsConfigurationExtension.java b/edc-extensions/iatp/tx-iatp-sts-dim/src/main/java/org/eclipse/tractusx/edc/iam/iatp/sts/dim/DimStsConfigurationExtension.java
index c02e004bd..ba17b9b45 100644
--- a/edc-extensions/iatp/tx-iatp-sts-dim/src/main/java/org/eclipse/tractusx/edc/iam/iatp/sts/dim/DimStsConfigurationExtension.java
+++ b/edc-extensions/iatp/tx-iatp-sts-dim/src/main/java/org/eclipse/tractusx/edc/iam/iatp/sts/dim/DimStsConfigurationExtension.java
@@ -26,7 +26,8 @@
 import org.eclipse.edc.spi.system.ServiceExtensionContext;
 import org.eclipse.tractusx.edc.core.utils.PathUtils;
 
-import static org.eclipse.tractusx.edc.core.utils.ConfigUtil.propertyCompatibility;
+import static java.util.Optional.ofNullable;
+import static org.eclipse.tractusx.edc.core.utils.ConfigUtil.missingMandatoryProperty;
 
 /**
  * Configuration Extension for the STS OAuth2 client
@@ -35,19 +36,13 @@
 public class DimStsConfigurationExtension implements ServiceExtension {
 
     @Setting(value = "STS OAuth2 endpoint for requesting a token")
-    public static final String TOKEN_URL = "tx.edc.iam.sts.oauth.token.url";
-    @Deprecated(since = "0.7.1")
-    public static final String TOKEN_URL_DEPRECATED = "edc.iam.sts.oauth.token.url";
+    public static final String TOKEN_URL = "edc.iam.sts.oauth.token.url";
 
     @Setting(value = "STS OAuth2 client id")
-    public static final String CLIENT_ID = "tx.edc.iam.sts.oauth.client.id";
-    @Deprecated(since = "0.7.1")
-    public static final String CLIENT_ID_DEPRECATED = "edc.iam.sts.oauth.client.id";
+    public static final String CLIENT_ID = "edc.iam.sts.oauth.client.id";
 
     @Setting(value = "Vault alias of STS OAuth2 client secret")
-    public static final String CLIENT_SECRET_ALIAS = "tx.edc.iam.sts.oauth.client.secret.alias";
-    @Deprecated(since = "0.7.1")
-    public static final String CLIENT_SECRET_ALIAS_DEPRECATED = "edc.iam.sts.oauth.client.secret.alias";
+    public static final String CLIENT_SECRET_ALIAS = "edc.iam.sts.oauth.client.secret.alias";
 
     protected static final String NAME = "DIM STS client configuration extension";
 
@@ -60,12 +55,21 @@ public String name() {
     @Provider
     public StsRemoteClientConfiguration clientConfiguration(ServiceExtensionContext context) {
 
-        var tokenUrl = PathUtils.removeTrailingSlash(propertyCompatibility(context, TOKEN_URL, TOKEN_URL_DEPRECATED));
-        var clientId = propertyCompatibility(context, CLIENT_ID, CLIENT_ID_DEPRECATED);
-        var clientSecretAlias = propertyCompatibility(context, CLIENT_SECRET_ALIAS, CLIENT_SECRET_ALIAS_DEPRECATED);
+        var tokenUrl = ofNullable(context.getConfig().getString(TOKEN_URL, null))
+                .map(PathUtils::removeTrailingSlash).orElse(null);
+        var clientId = context.getConfig().getString(CLIENT_ID, null);
+        var clientSecretAlias = context.getConfig().getString(CLIENT_SECRET_ALIAS, null);
 
         var monitor = context.getMonitor().withPrefix("STS Client for DIM");
-
+        if (tokenUrl == null) {
+            missingMandatoryProperty(monitor, TOKEN_URL);
+        }
+        if (clientId == null) {
+            missingMandatoryProperty(monitor, CLIENT_ID);
+        }
+        if (clientSecretAlias == null) {
+            missingMandatoryProperty(monitor, CLIENT_SECRET_ALIAS);
+        }
         return new StsRemoteClientConfiguration(tokenUrl, clientId, clientSecretAlias);
     }
 
diff --git a/edc-tests/edc-controlplane/fixtures/src/testFixtures/java/org/eclipse/tractusx/edc/tests/participant/TractusxIatpParticipantBase.java b/edc-tests/edc-controlplane/fixtures/src/testFixtures/java/org/eclipse/tractusx/edc/tests/participant/TractusxIatpParticipantBase.java
index 462ec1738..69dfaf4d0 100644
--- a/edc-tests/edc-controlplane/fixtures/src/testFixtures/java/org/eclipse/tractusx/edc/tests/participant/TractusxIatpParticipantBase.java
+++ b/edc-tests/edc-controlplane/fixtures/src/testFixtures/java/org/eclipse/tractusx/edc/tests/participant/TractusxIatpParticipantBase.java
@@ -54,7 +54,7 @@ public Map<String, String> iatpConfiguration(TractusxIatpParticipantBase... othe
         };
 
         Stream.concat(Stream.of(this), Arrays.stream(others)).forEach(p -> {
-            var prefix = "tx.iam.iatp.audiences.%s".formatted(p.getName().toLowerCase());
+            var prefix = "tx.edc.iam.iatp.audiences.%s".formatted(p.getName().toLowerCase());
             iatpConfiguration.put("%s.from".formatted(prefix), p.getBpn());
             iatpConfiguration.put("%s.to".formatted(prefix), p.getDid());
         });