Hi Gopi Krishna,
Thank you for reaching out to us on the Microsoft Q&A forum.
I understand your concern about your 31-day free trial subscription for Azure Portal coming to an end. I'm thrilled to hear that you've found immense value in utilizing our platform during this period.
While it's not possible to directly extend a trial subscription, you can upgrade your trial subscription to a Pay-As-You-Go subscription, which will enable you to continue using Azure services without interruption. You'll only be charged for the services you use, and you can manage your costs effectively.
To upgrade, simply go to the Azure portal, select "Subscriptions" from the left-hand menu, choose your trial subscription, and click on the "Upgrade" button.
If you encounter any future issues, please feel free to contact us, and we will be pleased to assist you further.
If you have found the answer provided to be helpful, please click on the "Upvote and Accept Answer" button so that it is useful for other members in the Microsoft Q&A community.