TTPSC provides 30 days free evaluation period for all apps. Normally Atlassian does not extend Cloud licenses. However in special situations, like migration, you can prolong the trial.
A trial extension can be proceeded by Atlassian Support before the first trial license expires. After submitting a request, you should receive a new evaluation license key.
You can contact Atlassian Support through this portal: https://support.atlassian.com/contact/#/
Atlassian may require Vendor’s approval for a trial extension. If you contact our support with a request for consent, please provide the following information in the ticket:
App name
Time period for which you want to extend the trial