Added whatsnew for October.

Author: csmulligan

articles/active-directory/external-identities/whats-new-docs.md

@@ -15,6 +15,25 @@ manager: CelesteDG
 
 Welcome to what's new in Azure Active Directory External Identities documentation. This article lists new docs that have been added and those that have had significant updates in the last three months. To learn what's new with the External Identities service, see [What's new in Azure Active Directory](../fundamentals/whats-new.md).
 
+## October 2022
+
+### Updated articles
+
+- [Tutorial: Bulk invite Azure AD B2B collaboration users](tutorial-bulk-invite.md)
+- [Quickstart: Add a guest user and send an invitation](b2b-quickstart-add-guest-users-portal.md)
+- [Define custom attributes for user flows](user-flow-add-custom-attributes.md)
+- [Create dynamic groups in Azure Active Directory B2B collaboration](use-dynamic-groups.md)
+- [Properties of an Azure Active Directory B2B collaboration user](user-properties.md)
+- [Authentication and Conditional Access for External Identities](authentication-conditional-access.md)
+- [Leave an organization as an external user](leave-the-organization.md)
+- [Azure Active Directory External Identities: What's new](whats-new-docs.md)
+- [Federation with SAML/WS-Fed identity providers for guest users](direct-federation.md)
+- [Example: Configure SAML/WS-Fed based identity provider federation with AD FS](direct-federation-adfs.md)
+- [The elements of the B2B collaboration invitation email - Azure Active Directory](invitation-email-elements.md)
+- [Configure Microsoft cloud settings for B2B collaboration (Preview)](cross-cloud-settings.md)
+- [Add Microsoft account (MSA) as an identity provider for External Identities](microsoft-account.md)
+- [How users in your organization can invite guest users to an app](add-users-information-worker.md)
+
 ## September 2022
 
 ### Updated articles