Update allocate-costs.md

Updating the limitations

Author: sdoultani

articles/cost-management-billing/costs/allocate-costs.md

@@ -126,15 +126,14 @@ Currently, Cost Management supports cost allocation in Cost analysis, budgets, a
 
 The following items are currently unsupported by cost allocation:
 
-- Billing subscriptions area
 - [Cost Management Power BI App](https://appsource.microsoft.com/product/power-bi/costmanagement.azurecostmanagementapp)
 - [Power BI Desktop connector](/power-bi/connect-data/desktop-connect-azure-cost-management)
 
 The [Cost Details](/rest/api/cost-management/generate-cost-details-report/create-operation?view=rest-cost-management-2023-11-01&tabs=HTTP) API and [Exports](/rest/api/cost-management/exports/create-or-update?view=rest-cost-management-2023-11-01&tabs=HTTP) support cost allocation data. However, the [Usage Details](/rest/api/consumption/usagedetails/list) API doesn't support cost allocation data.  
 
 However, cost allocation data results might be empty if you're using an unsupported API or if you don't have any cost allocation rules.
 
-If you have cost allocation rules enabled, the unit price for the reserved instance (RI) purchase shows up as 0 in the usage details file. To work around this limitation, you could use the price sheet data. 
+If you are an enterprise agreement (EA) customer and have cost allocation rules enabled, the unit price for the reserved instance (RI) purchase shows up as 0 in the usage details file. To work around this limitation, you could use the price sheet data. 
 
 Cost allocation to a target doesn't happen if that target doesn't have any costs associated with it.