Update date and format hidden groups note

Updated the date to 10/23/2025 and modified the note about hidden membership groups to a tip format.

Author: chrisda

defender-office-365/attack-simulation-training-simulation-automations.md

@@ -12,7 +12,7 @@ ms.collection:
   - tier2
 description: Admins can learn how to create automated simulations that contain specific techniques and payloads that launch when the specified conditions are met in Microsoft Defender for Office 365 Plan 2.
 search.appverid: met150
-ms.date: 10/23/2024
+ms.date: 10/23/2025
 appliesto:
   - ✅ <a href="https://learn.microsoft.com/defender-office-365/mdo-about#defender-for-office-365-plan-1-vs-plan-2-cheat-sheet" target="_blank">Microsoft Defender for Office 365 Plan 2</a>
 ---
@@ -196,7 +196,8 @@ On the **Target users** page, select who receives the simulation. Use the follow
     - Distribution groups (static only)
     - Mail-enabled Security groups (static only)
 
-Note that hidden membership groups are currently not supported. 
+    > [!TIP]
+    > Currently, hidden membership groups aren't supported.
 
     The following search tools are available: