Thank you for posting this in Microsoft Q&A.
I understand you are trying to create a resource group but are encountering the error, "You don't have permissions to create resource groups."
RBAC and Entra roles are different. The Global Administrator role falls under Entra roles. To create resource groups in the subscription, you at least need the Contributor role or the Owner role at the subscription level.
Can you please verify whether you have the required role? If not, you can ask the owner of the subscription to grant you the necessary permissions.
Instead of reaching out to the owner, you can elevate your own access with the help of the Global Administrator role. When you elevate your access, you are assigned the User Access Administrator role in Azure at the root scope. This allows you to view all resources and assign access in any subscription or management group within the tenant.
For your reference: https://learn.microsoft.com/en-us/azure/role-based-access-control/elevate-access-global-admin?tabs=azure-portal
Hope this helps. Do let us know if you any further queries.
Thanks,
Navya
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