Update app-protection-policies.md

Added a line stating that "You cannot choose a custom app when targeting all public apps in the same policy" as it is not possible

Author: msbemba

memdocs/intune/apps/app-protection-policies.md

@@ -85,7 +85,7 @@ When you create an app protection policy for iOS/iPadOS and Android apps, you fo
     |     Device types | Use this option to specify whether this policy applies to MDM managed devices or unmanaged devices. For iOS/iPadOS APP policies, select from **Unmanaged** and **Managed** devices. For Android APP policies, select from **Unmanaged**, **Android device administrator**, and **Android Enterprise**.  |
     | Target policy to | In the **Target policy to** dropdown box, choose to target your app protection policy to **All Apps**, **Microsoft Apps**, or **Core Microsoft Apps**.<p>-**All Apps** includes all Microsoft and partner apps that have integrated the Intune SDK.</br>-**Microsoft Apps** includes all Microsoft apps that have integrated the Intune SDK.</br>-**Core Microsoft Apps** includes the following apps: Edge, Excel, Office, OneDrive, OneNote, Outlook, PowerPoint, SharePoint, Teams, To Do, and Word.<p>Next, you can select **View a list of the apps that will be targeted** to view a list of the apps that will be affected by this policy.|
     | Public apps | If you do not want to select one of the pre-defined app groups, you can choose to target individual apps by selecting **Selected apps** in the **Target policy to** dropdown box. Click **Select public apps** to select public apps to target. |
-    | Custom apps | If you do not want to select one of the pre-defined app groups, you can choose to target individual apps by selecting **Selected apps** in the **Target policy to** dropdown box. Click **Select custom apps** to select custom apps to target based on a Bundle ID. |
+    | Custom apps | If you do not want to select one of the pre-defined app groups, you can choose to target individual apps by selecting **Selected apps** in the **Target policy to** dropdown box. Click **Select custom apps** to select custom apps to target based on a Bundle ID. You cannot choose a custom app when targeting all public apps in the same policy. |
 
     The app(s) you have selected will appear in the public and custom apps list.