During the Free Trial, the users are allowed access to the enterprise plan. They can switch to the free plan or business plan by following the steps below:
Step 1: From the admin left panel, click on Settings. From the options that open, select Subscriptions.

Step 3: From the options listed, select Plans.

Step 4: The plan will be enterprise by default. Select any other plan as you wish.

Step 5: Click Switch. The plan will be changed accordingly.