See the solution in the explanation below:
Explanation:
To provide only Adele Vance with the ability to turn on and off Teams preview features, you need to create and assign a custom update policy for her. Here are the steps to do so:
* Sign in to the Microsoft Teams admin center with your Microsoft 365 username and password1.
* In the left navigation, go to Teams > Teams Update policies.
* Select Add to create a new policy or select an existing policy to open Update policy.
* Name the update policy, add a description, and select Enabled from the drop-down menu for Allow public preview. This option enables Teams Public Preview regardless of whether a user is enrolled in Office Current Channel (Preview). The end user must also opt in to Teams public preview in their Teams app2.
* Click Save and then Close.
* In the left navigation, go to Users and then search for Adele Vance from the list of users.
* In the user details page, go to Policies and then click Edit next to Assigned policies.
* In the Assigned policies pane, under Update policy, select the policy that you created or modified in step 4 from the drop-down menu.
* Click Apply and then Close.
Now, Adele Vance can turn on and off Teams preview features by following these steps in her Teams app3:
* Select the three dots to the left of your profile to display the Teams menu.
* Select About > Public preview.
* Select Switch to Public preview or Switch back to standard version.