Merge pull request #842 from MicrosoftDocs/vivek-teamsxdrchanges

renamed page/ Added subsection (DEX apps permissions)

Author: vpattnai

defender-xdr/teams-restrictions-dexapp.md

@@ -15,15 +15,17 @@ ms.collection:
   - essentials-manage
 ms.topic: conceptual
 search.appverid: met150
-ms.date: 05/15/2024
+ms.date: 06/27/2024
 ---
 
-# Troubleshooting Microsoft Defender Experts app permissions in Microsoft Teams
+# Troubleshooting issues with Microsoft Defender Experts app in Microsoft Teams
 
 **Applies to:**
 
 - [Microsoft Defender XDR](microsoft-365-defender.md)
 
+## App policy permissions
+
 The Microsoft Defender Experts app is available for Microsoft Teams by default, but some environments might have limitations that block the app's installation because of app policy permissions in Teams. [Learn how to check Teams app permissions policies](#check-the-teams-app-permission-policies)
 
 :::image type="content" source="/defender-xdr/media/teams-communication-issues.png" alt-text="Screenshot of Teams communication restrictions." lightbox="media/teams-communication-issues.png":::
@@ -34,7 +36,7 @@ The following screenshot is an example of the missing bot:
 
 :::image type="content" source="/defender-xdr/media/teams-app-bot.png" alt-text="Screenshot of Teams app bot.":::
 
-## Check the Teams app permission policies
+### Check the Teams app permission policies
 
 **To verify if the Teams permission policies are preventing the Defender Experts app from working, follow these steps.**
 
@@ -59,14 +61,14 @@ This app is blocked in app permission policies. To approve a user's app request,
 
   :::image type="content" source="/defender-xdr/media/app-permissions-blocked.png" alt-text="Screenshot of Defender Experts app permissions blocked image in Teams.":::
 
-## Fix the Teams app permission policies
+### Fix the Teams app permission policies
 
 You have two options to fix the Teams app permission policy that stops the Defender Experts app from running:
 
 - [Change the policy that blocks the Defender Experts app from running](#change-the-policy-that-blocks-the-defender-experts-app-from-running)
 - [Add a new policy that lets the Defender Experts app run](#add-a-new-policy-that-lets-the-defender-experts-app-run)
 
-### Change the policy that blocks the Defender Experts app from running
+#### Change the policy that blocks the Defender Experts app from running
 
 1. Go to the [App permission policies page](https://admin.teams.microsoft.com/policies/app-permission). Read more about [App permission policies - Microsoft Teams admin center](/microsoftteams/teams-app-permission-policies)
 2. Look at each policy and see if **Microsoft apps** is set to **Allow specific apps and block all others**.
@@ -79,7 +81,7 @@ You have two options to fix the Teams app permission policy that stops the Defen
 
 The app should start working after 24 hours.
 
-### Add a new policy that lets the Defender Experts app run
+#### Add a new policy that lets the Defender Experts app run
 
 1. Go to the **App permission policies** page and then select **Add**.
 2. In the flyout panel on the right side, search for and select **Defender Experts**, and then select **Allow**.
@@ -88,6 +90,10 @@ The app should start working after 24 hours.
 
 3. Complete the rest of the fields as needed then select **Save**. If this policy is for a group of users, make sure that all the members in the channel are assigned to the policy. The app should start working after 24 hours.
 
+## Teams channel unavailable
+
+You will not be able to receive updates or chat with Defender Experts if the Managed Response channel is archived or deleted. To learn more, see how to [archive](https://support.microsoft.com/office/archive-or-restore-a-channel-53c46491-a265-4391-a2a7-001c5026c9e5) or [restore a deleted channel](https://support.microsoft.com/office/delete-a-channel-in-microsoft-teams-973f9014-53db-4165-8ab4-365021fe36b7).
+
 ### See also
 
 - [Communicating with Defender Experts for XDR](communicate-defender-experts-xdr.md)