Merge pull request #164488 from amsliu/customize-branding-update

add clarification to note

Author: v-shmck

articles/active-directory/fundamentals/customize-branding.md

@@ -28,7 +28,7 @@ You can customize your Azure AD sign-in pages, which appear when users sign in t
 Your custom branding won't immediately appear when your users go to sites such as, www\.office.com. Instead, the user has to sign-in before your customized branding appears. After the user has signed in, the branding may take 15 minutes or longer to appear. 
 
 > [!NOTE]
-> All branding elements are optional. For example, if you specify a banner logo with no background image, the sign-in page will show your logo with a default background image from the destination site (for example, Microsoft 365).<br><br>Additionally, sign-in page branding doesn't carry over to personal Microsoft accounts. If your users or business guests sign in using a personal Microsoft account, the sign-in page won't reflect the branding of your organization.
+> **All branding elements are optional and will remain default when unchanged.** For example, if you specify a banner logo with no background image, the sign-in page will show your logo with a default background image from the destination site such as Microsoft 365.<br><br>Additionally, sign-in page branding doesn't carry over to personal Microsoft accounts. If your users or business guests sign in using a personal Microsoft account, the sign-in page won't reflect the branding of your organization.
 
 ### To customize your branding
 1. Sign in to the [Azure portal](https://portal.azure.com/) using a Global administrator account for the directory.