SUBSCRIPTION I AM (RBAC)

Hello @Gabriel Moraes Thank you for reaching out to us on Microsoft Q&A platform. Happy to help!

Based on the information you provided, I understand that you assigned the Backup Contributor (RBAC) role to another Azure subscription and now want to remove it but the functionality isn't available on source subscription. Please follow the suggestions shared below:

1. Check the role assignment: Make sure that the role assignment is associated with the correct subscription. It's possible that you may have assigned the role to a different subscription by mistake. You can check the role assignment in the Azure portal by selecting the subscription and then selecting Access control (IAM).
2. Check the role definition: Make sure that the Backup Contributor role definition is available in the subscription. It's possible that the role definition may have been deleted or modified, which could prevent you from removing the role assignment. You can check the role definitions in the Azure portal by selecting Roles and administrators > Roles.
3. Check the Azure AD tenant: Make sure that the user or group that you are trying to remove the role assignment for is associated with the correct Azure AD tenant. It's possible that the user or group may be associated with a different tenant, which could prevent you from removing the role assignment.
4. Check the Azure Lighthouse settings: If you used Azure Lighthouse to access both subscriptions, make sure that the role assignment is not associated with a delegated provider or a delegated resource group. It's possible that the role assignment may be associated with a delegated provider or resource group, which could prevent you from removing the role assignment.

If none of these steps resolve the issue, you may need to contact Microsoft support for further assistance by raising a support ticket.

Hope this helps!