diff --git a/changelog.md b/changelog.md
index 5c351521..f7948d9a 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,33 @@
+# Microsoft 365 Agents SDK for Python - Release Notes v0.9.0
+
+**Release Date:** April 15, 2026
+**Previous Version:** 0.8.0 (Released February 23, 2026)
+
+## Major Features & Enhancements
+
+- **OpenTelemetry Support**: Full distributed tracing and metrics support with traces spanning adapter, app, auth, OAuth, storage, and turn-context layers. Includes a new OTel sample and comprehensive test coverage (#341)
+- **Proactive Messaging**: New `proactive` module in `AgentApplication` with `Conversation`, `ConversationBuilder`, and `ConversationReferenceBuilder` abstractions for initiating outbound conversations (#350)
+- **FederatedCredentials Auth Type**: Support for Managed Identity with Federated Identity Credential (FIC) authentication type in MSAL auth (#353)
+- **PFX Certificate Auth**: Support for PFX files in MSAL Certificate authentication type (#349)
+
+## Bug Fixes
+
+- **MCS Connector**: Fixed incorrect connector creation in `RestChannelServiceClientFactory` for MCS channels (#360)
+- **FastAPI JWT Middleware**: Fixed parity with aiohttp by correcting async handling in JWT authorization middleware (#343)
+- **OpenTelemetry Testing Utility**: Fixed `DeltaMetricReader` test utility (#362)
+
+## Developer Experience
+
+- **Streaming Consolidation**: Moved `StreamingResponse`, `Citation`, and `CitationUtil` from `hosting-aiohttp` and `hosting-fastapi` into `hosting-core`, eliminating duplication (#339)
+- **PyJWKClient Caching**: Added thread-safe JWK client caching with a dedicated `JwkClientManager` class to reduce redundant token-key fetches (#338)
+- **Connector Validation**: Improved response-data validation in `ConversationsOperations` methods with added test coverage (#317)
+
+## Documentation
+
+- **Packages Overview**: Added missing `microsoft-agents-hosting-fastapi` entry to the README packages overview (#346)
+
+---
+
 # Microsoft 365 Agents SDK for Python - Release Notes v0.8.0
 
 **Release Date:** February 23, 2026
diff --git a/libraries/microsoft-agents-activity/readme.md b/libraries/microsoft-agents-activity/readme.md
index 684dd39e..b7e06539 100644
--- a/libraries/microsoft-agents-activity/readme.md
+++ b/libraries/microsoft-agents-activity/readme.md
@@ -15,6 +15,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>0.9.0</td>
+    <td>2026-04-15</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v090">
+        0.9.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>0.8.0</td>
     <td>2026-02-23</td>
diff --git a/libraries/microsoft-agents-authentication-msal/readme.md b/libraries/microsoft-agents-authentication-msal/readme.md
index 46e3fb6e..af91d9c5 100644
--- a/libraries/microsoft-agents-authentication-msal/readme.md
+++ b/libraries/microsoft-agents-authentication-msal/readme.md
@@ -15,6 +15,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>0.9.0</td>
+    <td>2026-04-15</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v090">
+        0.9.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>0.8.0</td>
     <td>2026-02-23</td>
diff --git a/libraries/microsoft-agents-copilotstudio-client/readme.md b/libraries/microsoft-agents-copilotstudio-client/readme.md
index 63378ceb..f25824e2 100644
--- a/libraries/microsoft-agents-copilotstudio-client/readme.md
+++ b/libraries/microsoft-agents-copilotstudio-client/readme.md
@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>0.9.0</td>
+    <td>2026-04-15</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v090">
+        0.9.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>0.8.0</td>
     <td>2026-02-23</td>
diff --git a/libraries/microsoft-agents-hosting-aiohttp/readme.md b/libraries/microsoft-agents-hosting-aiohttp/readme.md
index 12c597c4..09734a8a 100644
--- a/libraries/microsoft-agents-hosting-aiohttp/readme.md
+++ b/libraries/microsoft-agents-hosting-aiohttp/readme.md
@@ -17,6 +17,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>0.9.0</td>
+    <td>2026-04-15</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v090">
+        0.9.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>0.8.0</td>
     <td>2026-02-23</td>
diff --git a/libraries/microsoft-agents-hosting-core/readme.md b/libraries/microsoft-agents-hosting-core/readme.md
index de60f9c4..84c62dc3 100644
--- a/libraries/microsoft-agents-hosting-core/readme.md
+++ b/libraries/microsoft-agents-hosting-core/readme.md
@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>0.9.0</td>
+    <td>2026-04-15</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v090">
+        0.9.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>0.8.0</td>
     <td>2026-02-23</td>
diff --git a/libraries/microsoft-agents-hosting-fastapi/readme.md b/libraries/microsoft-agents-hosting-fastapi/readme.md
index 9b6f2ec7..88886f48 100644
--- a/libraries/microsoft-agents-hosting-fastapi/readme.md
+++ b/libraries/microsoft-agents-hosting-fastapi/readme.md
@@ -9,6 +9,15 @@ This library provides FastAPI integration for Microsoft Agents, enabling you to
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>0.9.0</td>
+    <td>2026-04-15</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v090">
+        0.9.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>0.8.0</td>
     <td>2026-02-23</td>
diff --git a/libraries/microsoft-agents-hosting-teams/readme.md b/libraries/microsoft-agents-hosting-teams/readme.md
index ab967eb6..fd93c662 100644
--- a/libraries/microsoft-agents-hosting-teams/readme.md
+++ b/libraries/microsoft-agents-hosting-teams/readme.md
@@ -18,6 +18,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>0.9.0</td>
+    <td>2026-04-15</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v090">
+        0.9.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>0.8.0</td>
     <td>2026-02-23</td>
diff --git a/libraries/microsoft-agents-storage-blob/readme.md b/libraries/microsoft-agents-storage-blob/readme.md
index 7c1ed4d3..db9cb981 100644
--- a/libraries/microsoft-agents-storage-blob/readme.md
+++ b/libraries/microsoft-agents-storage-blob/readme.md
@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>0.9.0</td>
+    <td>2026-04-15</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v090">
+        0.9.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>0.8.0</td>
     <td>2026-02-23</td>
diff --git a/libraries/microsoft-agents-storage-cosmos/readme.md b/libraries/microsoft-agents-storage-cosmos/readme.md
index de5f0cce..f6f3a863 100644
--- a/libraries/microsoft-agents-storage-cosmos/readme.md
+++ b/libraries/microsoft-agents-storage-cosmos/readme.md
@@ -16,6 +16,15 @@ This library is part of the **Microsoft 365 Agents SDK for Python** - a comprehe
     <th style="width:20%">Date</th>
     <th style="width:60%">Release Notes</th>
   </tr>
+  <tr>
+    <td>0.9.0</td>
+    <td>2026-04-15</td>
+    <td>
+      <a href="https://github.com/microsoft/Agents-for-python/blob/main/changelog.md#microsoft-365-agents-sdk-for-python---release-notes-v090">
+        0.9.0 Release Notes
+      </a>
+    </td>
+  </tr>
   <tr>
     <td>0.8.0</td>
     <td>2026-02-23</td>
diff --git a/versioning/TARGET-VERSION b/versioning/TARGET-VERSION
index 83eda3e7..d46ea7aa 100644
--- a/versioning/TARGET-VERSION
+++ b/versioning/TARGET-VERSION
@@ -1 +1 @@
-0.9.0.
+0.10.0.