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Troubleshooting Microsoft Defender Experts app permissions in Microsoft Teams

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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

Screenshot of Teams communication restrictions.

When you join the Defender Experts Teams channel, you should be able to mention or tag the Defender Experts bot in the channel by typing @Defender Experts. If the bot doesn't show up in the list of suggestions, then it might be that the Teams permissions policies are preventing the app from functioning. Learn more about communicating with Defender Experts for XDR

The following screenshot is an example of the missing bot:

Screenshot of Teams app bot.

Check the Teams app permission policies

To verify if the Teams permission policies are preventing the Defender Experts app from working, follow these steps.

  1. In Microsoft Teams, select Apps on the Teams workspace.

    Screenshot of Apps options in Teams workspace.

  2. Type Defender Experts in the search pane to see the Defender Experts app.

  3. Select Request to request for the Defender Experts service.

    Screenshot to request Defender Experts app in Microsoft Teams.

If you have the Teams app installed already, and you encounter a policy issue, do the following:

If you see the following notification, then the Teams app permission policies are preventing you from using the Defender Experts app:

This app is blocked in app permission policies. To approve a user's app request, review the app permission policies assigned to them and allow the app in any policies where it's blocked.

Screenshot of Defender Experts app permissions blocked image in Teams.

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

  1. Go to the App permission policies page. Read more about App permission policies - Microsoft Teams admin center

  2. Look at each policy and see if Microsoft apps is set to Allow specific apps and block all others.

    Screenshot of option to allow Teams app installation.

  3. Select Add apps. On the flyout panel, look for Defender Experts, and select Allow.

    Screenshot to allow Defender Experts app installation.

The app should start working after 24 hours.

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.

    Screenshot to allow Defender Experts app flyout panel.

  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.

See also