Merge pull request #249794 from csmulligan/csmulligan-b2b-xtap

Add note about XTAP migrations 2

Author: prmerger-automator[bot]

articles/active-directory/external-identities/cross-tenant-access-overview.md

@@ -19,6 +19,9 @@ ms.collection: M365-identity-device-management
 Azure AD organizations can use External Identities cross-tenant access settings to manage how they collaborate with other Azure AD organizations and other Microsoft Azure clouds through B2B collaboration and [B2B direct connect](cross-tenant-access-settings-b2b-direct-connect.md). [Cross-tenant access settings](cross-tenant-access-settings-b2b-collaboration.md) give you granular control over how external Azure AD organizations collaborate with you (inbound access) and how your users collaborate with external Azure AD organizations (outbound access). These settings also let you trust multi-factor authentication (MFA) and device claims ([compliant claims and hybrid Azure AD joined claims](../conditional-access/howto-conditional-access-policy-compliant-device.md)) from other Azure AD organizations.
 
 This article describes cross-tenant access settings, which are used to manage B2B collaboration and B2B direct connect with external Azure AD organizations, including across Microsoft clouds. More settings are available for B2B collaboration with non-Azure AD identities (for example, social identities or non-IT managed external accounts). These [external collaboration settings](external-collaboration-settings-configure.md) include options for restricting guest user access, specifying who can invite guests, and allowing or blocking domains.
+
+> [!IMPORTANT]
+> Microsoft is beginning to move customers using cross-tenant access settings to a new storage model on August 30, 2023. You may notice an entry in your audit logs informing you that your cross-tenant access settings were updated as our automated task migrates your settings. For a brief window while the migration processes, you will be unable to make changes to your settings. If you are unable to make a change, you should wait a few moments and try the change again. Once the migration completes, [you will no longer be capped with 25kb of storage space](/azure/active-directory/external-identities/faq#how-many-organizations-can-i-add-in-cross-tenant-access-settings-) and there will be no more limits on the number of partners you can add.
  
 ## Manage external access with inbound and outbound settings
 

articles/active-directory/external-identities/cross-tenant-access-settings-b2b-collaboration.md

@@ -18,6 +18,9 @@ ms.collection: M365-identity-device-management
 
 Use External Identities cross-tenant access settings to manage how you collaborate with other Azure AD organizations through B2B collaboration. These settings determine both the level of *inbound* access users in external Azure AD organizations have to your resources, and the level of *outbound* access your users have to external organizations. They also let you trust multi-factor authentication (MFA) and device claims ([compliant claims and hybrid Azure AD joined claims](../conditional-access/howto-conditional-access-policy-compliant-device.md)) from other Azure AD organizations. For details and planning considerations, see [Cross-tenant access in Azure AD External Identities](cross-tenant-access-overview.md).
 
+> [!IMPORTANT]
+> Microsoft is beginning to move customers using cross-tenant access settings to a new storage model on August 30, 2023. You may notice an entry in your audit logs informing you that your cross-tenant access settings were updated as our automated task migrates your settings. For a brief window while the migration processes, you will be unable to make changes to your settings. If you are unable to make a change, you should wait a few moments and try the change again. Once the migration completes, [you will no longer be capped with 25kb of storage space](/azure/active-directory/external-identities/faq#how-many-organizations-can-i-add-in-cross-tenant-access-settings-) and there will be no more limits on the number of partners you can add.
+
 ## Before you begin
 
   > [!CAUTION]

articles/active-directory/external-identities/cross-tenant-access-settings-b2b-direct-connect.md

@@ -27,6 +27,9 @@ Use cross-tenant access settings to manage how you collaborate with other Azure
 
 Learn more about using cross-tenant access settings to [manage B2B direct connect](b2b-direct-connect-overview.md#managing-cross-tenant-access-for-b2b-direct-connect).
 
+> [!IMPORTANT]
+> Microsoft is beginning to move customers using cross-tenant access settings to a new storage model on August 30, 2023. You may notice an entry in your audit logs informing you that your cross-tenant access settings were updated as our automated task migrates your settings. For a brief window while the migration processes, you will be unable to make changes to your settings. If you are unable to make a change, you should wait a few moments and try the change again. Once the migration completes, [you will no longer be capped with 25kb of storage space](/azure/active-directory/external-identities/faq#how-many-organizations-can-i-add-in-cross-tenant-access-settings-) and there will be no more limits on the number of partners you can add.
+
 ## Before you begin
 
 - Review the [Important considerations](cross-tenant-access-overview.md#important-considerations) section in the [cross-tenant access overview](cross-tenant-access-overview.md) before configuring your cross-tenant access settings.