Branding change update.

Author: csmulligan

articles/active-directory/external-identities/external-collaboration-settings-configure.md

@@ -96,6 +96,13 @@ Add-MsolRoleMember -RoleObjectId 95e79109-95c0-4d8e-aee3-d01accf2d47b -RoleMembe
 
 When a B2B user signs into a resource tenant to collaborate, a sign-in log is generated in both the home tenant and the resource tenant. These logs include information such as the application being used, email addresses, tenant name, and tenant ID for both the home tenant and the resource tenant. 
 
+### B2B collaboration branding changes
+
+Starting from September 30, 2023, when B2B collaboration end-users perform cross-tenant sign-ins, they'll notice a change in branding. Instead of seeing the resource tenant's branding, the branding will update to show their home tenant branding, even if there isn't custom branding specified. 
+We're making this change to highlight that the user is signing into their home account. No action is needed from you to enable this change.
+
+:::image type="content" source="media/external-identities-overview/placeholder.png" alt-text="Placeholder alt text."::: 
+
 ## Next steps
 
 See the following articles on Azure AD B2B collaboration:

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

@@ -120,6 +120,7 @@ Microsoft Azure cloud services are available in separate national clouds, which
 - Microsoft Azure global cloud and Microsoft Azure operated by 21Vianet
 
 To set up B2B collaboration between tenants in different clouds, both tenants need to configure their Microsoft cloud settings to enable collaboration with the other cloud. Then each tenant must configure inbound and outbound cross-tenant access with the tenant in the other cloud. See [Microsoft cloud settings](cross-cloud-settings.md) for details.
+
 ### External collaboration settings
 
 External collaboration settings determine whether your users can send B2B collaboration invitations to external users and the level of access guest users have to your directory. With these settings, you can:
@@ -131,6 +132,7 @@ External collaboration settings determine whether your users can send B2B collab
 - **Allow or block domains**. Choose whether to allow or deny invitations to the domains you specify. For details, see [Allow or block domains](allow-deny-list.md).
 
 For more information, see how to [configure B2B external collaboration settings](external-collaboration-settings-configure.md).
+
 ### How external collaboration and cross-tenant access settings work together
 
 External collaboration settings work at the invitation level, whereas cross-tenant access settings work at the authentication level.
@@ -143,6 +145,13 @@ When you're considering B2B collaboration with a specific external Azure AD orga
 
 - **Example 2**: You allow B2B collaboration with Fabrikam in your cross-tenant access settings, but then you add `fabrikam.com` to your blocked domains in your external collaboration settings. Your users won't be able to invite new Fabrikam guest users, but existing Fabrikam guests will be able to continue using B2B collaboration.
 
+### B2B collaboration branding changes
+
+Starting from September 30, 2023, when B2B collaboration end-users perform cross-tenant sign-ins, they'll notice a change in branding. Instead of seeing the resource tenant's branding, the branding will update to show their home tenant branding, even if there isn't custom branding specified. 
+We're making this change to highlight that the user is signing into their home account. No action is needed from you to enable this change.
+
+:::image type="content" source="media/external-identities-overview/placeholder.png" alt-text="Placeholder alt text."::: 
+
 ### Azure Active Directory B2C management
 
 Azure AD B2C is a separate consumer-based directory that you manage in the Azure portal through the Azure AD B2C service. Each Azure AD B2C tenant is separate and distinct from other Azure Active Directory and Azure AD B2C tenants. The Azure AD B2C portal experience is similar to Azure AD, but there are key differences, such as the ability to customize your user journeys using the Identity Experience Framework.