How to Prevent Deletion of Chat Messages in Microsoft Teams for Research Department

B.

The correct answer is B. Create a new messaging policy.

To prevent only users in the company's research department from deleting chat messages, you need to create a new messaging policy with the appropriate settings. Follow these steps to create the messaging policy:

1. Go to the Microsoft Teams admin center (https://admin.teams.microsoft.com).
2. In the left-hand navigation menu, click on "Messaging policies."
3. Click on the "Add" button to create a new messaging policy.
4. Enter a name and description for the policy.
5. Scroll down to the "Message deletion" section and select the option "Owners can delete sent messages" to prevent users from deleting their own messages.
6. Select the option "Owners and members can delete sent messages" to allow users to delete their own messages, but prevent others from deleting messages.
7. Under "Users," click "Add" to add the users in the research department to the policy.
8. Click "Save" to create the policy.

After you create the policy, assign it to the users in the research department by following these steps:

1. In the Microsoft Teams admin center, click on "Users" in the left-hand navigation menu.
2. Select the research department users.
3. Click on the "Edit" button to edit the users' messaging policy settings.
4. Under "Messaging policy," select the policy you just created.
5. Click "Save" to assign the policy to the users.

By following these steps, you will prevent only the users in the research department from deleting chat messages in Microsoft Teams.