For existing trial subscriptions, you can prolong the trial period to match customer needs and requirements. Check out how to do that!
Extending a Trial Subscription Period
Locate the trial subscription.
Click the 'Extend Trial Period' option on the 'Shortcut' menu.
On the popup screen select the extension parameters. You can either extend the subscription for the pre-defined trial period or you can select a new period by clicking the appropriate option.