Hello @Hassaan Ahmed Please find below answer to your question:
Once the 30 day trial expires for Azure AD Premium P2, does the tenant revert back to basic? If yes, then I'm good.
Yes, once the Azure AD Premium P2 trial expires, Azure AD tenant automatically reverts back to free version.
If not, how do I go about deleting/canceling this Azure AD Premium P2 trial without having a 'work' id associated to it? the only user associated to it currently is my personal 'xxx@Karima ben .com' email id. Do I need to go in and create a work ID first to be able to log in to a O365 admin portal and delete it from there? In doing so, my concern is i'll get charged, not sure if the 30 day trial period has ended or not.
If you do not want to wait for 30 days for the trial to expire, you can cancel it using the Office businessstore portal. You can select the subscription from the list . and view the details of the same. It will take you to a page similar to the following where you can cancel it . You would need to sign in using your organizational account (Work ID) e.g. user@newtenant.onmicrosoft.com as personal accounts(outlook.com , live.com ) do not work. Once the subscription is cancelled, you can delete it as shown below:
Before deleting the tenant, you can delete the work account and perform the tenant deletion with your hotmail account.
Note: After you delete the Azure AD Premium P2 Subscription, it might take upto 72 hours for the changes to take effect.
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