To switch your tenant to use Microsoft Entra ID Premium P1, follow these steps:
Sign in to the Microsoft 365 admin center.
Navigate to Billing or Marketplace.
Select Security and identity.
Check the detailed information and pricing for Microsoft Entra ID P1 licenses.
Additionally, you can assign or remove licenses in Microsoft Entra by going to Identity > Users > All users > select a user > Properties. When assigning licenses to a group or performing bulk updates, any user whose usage location isn’t specified inherits the location of the tenant.
Check Eligibility: Free accounts may have limited access to certain premium features. Ensure your account is eligible for a trial or consider contacting Azure support for further assistance.
Contact Sales: If you face any issues or need further clarification, consider reaching out to Azure sales or support for personalized assistance.