diff --git a/extensions/common/iam/oauth2/oauth2-core/README.md b/extensions/common/iam/oauth2/oauth2-core/README.md
index e98bf54e209..19731d74173 100644
--- a/extensions/common/iam/oauth2/oauth2-core/README.md
+++ b/extensions/common/iam/oauth2/oauth2-core/README.md
@@ -1,5 +1,7 @@
 # OAuth 2 Identity Service
 
+**DEPRECATED**: this repo has been deprecated in version 0.10.0 and it will be deleted in the upcoming versions.
+
 This extension provides an `IdentityService` implementation based on the OAuth2 protocol for authorization.
 
 ## Configuration
diff --git a/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceConfiguration.java b/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceConfiguration.java
index f28200348b5..29392178ac5 100644
--- a/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceConfiguration.java
+++ b/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceConfiguration.java
@@ -21,7 +21,10 @@
 
 /**
  * Configuration values and dependencies for {@link Oauth2ServiceImpl}.
+ *
+ * @deprecated please switch to DCP.
  */
+@Deprecated(since = "0.10.0")
 @Settings
 public class Oauth2ServiceConfiguration {
     static final String ISSUED_AT_LEEWAY = "edc.oauth.validation.issued.at.leeway";
diff --git a/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceDefaultServicesExtension.java b/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceDefaultServicesExtension.java
index 5b203fa1c7a..782f64ccc3b 100644
--- a/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceDefaultServicesExtension.java
+++ b/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceDefaultServicesExtension.java
@@ -22,7 +22,10 @@
 /**
  * Provides default service implementations for fallback
  * Omitted {@link org.eclipse.edc.runtime.metamodel.annotation.Extension} since this module already contains {@link Oauth2ServiceExtension}
+ *
+ * @deprecated please switch to DCP.
  */
+@Deprecated(since = "0.10.0")
 public class Oauth2ServiceDefaultServicesExtension implements ServiceExtension {
 
     public static final String NAME = "OAuth2 Core Default Services";
diff --git a/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceExtension.java b/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceExtension.java
index 94aa811778a..b9193b24860 100644
--- a/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceExtension.java
+++ b/extensions/common/iam/oauth2/oauth2-core/src/main/java/org/eclipse/edc/iam/oauth2/Oauth2ServiceExtension.java
@@ -51,9 +51,12 @@
 
 /**
  * Provides OAuth2 client credentials flow support.
+ *
+ * @deprecated please switch to DCP.
  */
 @Provides({ IdentityService.class })
 @Extension(value = Oauth2ServiceExtension.NAME)
+@Deprecated(since = "0.10.0")
 public class Oauth2ServiceExtension implements ServiceExtension {
 
     public static final String NAME = "OAuth2 Identity Service";
diff --git a/extensions/common/iam/oauth2/oauth2-service/README.md b/extensions/common/iam/oauth2/oauth2-service/README.md
index 413d830858c..ac8e1434372 100644
--- a/extensions/common/iam/oauth2/oauth2-service/README.md
+++ b/extensions/common/iam/oauth2/oauth2-service/README.md
@@ -1,7 +1,9 @@
 # OAuth 2 Service
 
+**DEPRECATED**: this service has been deprecated in version 0.10.0 and it will be deleted in the upcoming versions.
+
 This BOM provides a ready-to-use version of the [Oauth2 IdentityService](../oauth2-core) including the [Oauth2 Client](../oauth2-client)
 provided by the EDC.
 
 > **_NOTE:_**  Unless you are sure of what you are doing, you do not want to implement your own Oauth2 Client in most cases.
-> This BOM should thus be considered as the standard and recommended approach of embedding the Oauth2 Identity Service into your runtime.
\ No newline at end of file
+> This BOM should thus be considered as the standard and recommended approach of embedding the Oauth2 Identity Service into your runtime.