I recently found out that there is a way to extend the Dynamics CRM trial instance for another 30 days without the need of logging a support ticket.

On your Office 365 Admin Portal (https://portal.office.com/admin/default.aspx), navigate to Billing > Subscriptions > Select the trial product to be extended > Click on Extend link at the right hand side of the product pane.

Unfortunately it will ask for Credit Card Detail, but Microsoft would not charge the credit card for the extension.

If you don’t mind to enter the detail, it will be helpful to quickly extend the trial instance without the need of support ticket.