Added info about MTO.

Author: csmulligan

articles/active-directory/external-identities/external-identities-overview.md

@@ -103,7 +103,7 @@ Cross-tenant access settings let you manage B2B collaboration and B2B direct con
 
 For more information, see [Cross-tenant access in Azure AD External Identities](cross-tenant-access-overview.md).
 
-Azure AD ha a new feature called multi-tenant organizations. Multi-tenant organizations are using cross-tenant synchronization (preview) for seamless collaboration experience across Azure AD tenants. Cross-tenant synchronization settings are also configured under the **Organization-specific access settings**. To learn more about multi-tenant organizations and cross-tenant synchronization see the [Multi-tenant organizations documentation](https://review.learn.microsoft.com/en-us/azure/active-directory/multi-tenant-organizations/?branch=pr-en-us-209054).
+Azure AD has a new feature called multi-tenant organizations. Multi-tenant organizations are using cross-tenant synchronization (preview) for seamless collaboration experience across Azure AD tenants. Cross-tenant synchronization settings are also configured under the **Organization-specific access settings**. To learn more about multi-tenant organizations and cross-tenant synchronization see the [Multi-tenant organizations documentation](https://review.learn.microsoft.com/en-us/azure/active-directory/multi-tenant-organizations/?branch=pr-en-us-209054).
 
 ### Microsoft cloud settings for B2B collaboration (preview)
 

articles/active-directory/external-identities/index.yml

@@ -85,4 +85,19 @@ landingContent:
           - text: Add a self-service sign-up user flow
             url: self-service-sign-up-user-flow.md
           - text: Define custom attributes for user flows
-            url: user-flow-add-custom-attributes.md
+            url: user-flow-add-custom-attributes.md
+  - title: Multi-tenant organizations 
+    linkLists:
+      - linkListType: overview
+        links:
+          - text: What is a multi-tenant organization in Azure AD?
+            url: https://review.learn.microsoft.com/en-us/azure/active-directory/multi-tenant-organizations/overview?branch=pr-en-us-209054
+      - linkListType: concept
+        links:
+          - text: Topologies for cross-tenant synchronization
+            url: https://review.learn.microsoft.com/en-us/azure/active-directory/multi-tenant-organizations/cross-tenant-synchronization-topology?branch=pr-en-us-209054
+      - linkListType: how-to-guide
+        links:
+          - text: Configure cross-tenant synchronization
+            url: https://review.learn.microsoft.com/en-us/azure/active-directory/multi-tenant-organizations/cross-tenant-synchronization-configure?branch=pr-en-us-209054
+             

articles/active-directory/external-identities/toc.yml

@@ -70,6 +70,8 @@
     href: authentication-conditional-access.md
   - name: Azure AD B2C (link to documentation)
     href: ../../active-directory-b2c/overview.md
+  - name: Multi-tenant organizations documentation (link to documentation)
+    href: https://review.learn.microsoft.com/en-us/azure/active-directory/multi-tenant-organizations/?branch=pr-en-us-209054
 - name: How-to guides
   expanded: false
   items: