Merge pull request #100265 from hiromingithub/patch-3

Request to add CSP info.

Author: Jak-MS

articles/cost-management-billing/reservations/synapse-analytics-pre-purchase-plan.md

@@ -34,10 +34,11 @@ For more information about available SCU tiers and pricing discounts, you'll use
 
 ## Purchase Synapse commit units
 
-You buy Synapse plans in the [Azure portal](https://portal.azure.com). To buy a Pre-Purchase Plan, you must have the owner role for at least one enterprise subscription.
+You buy Synapse plans in the [Azure portal](https://portal.azure.com). To buy a Pre-Purchase Plan, you must have the owner role for at least one enterprise or Microsoft Customer Agreement or an individual subscription with pay-as-you-go rates subscription, or the required role for CSP subscriptions.
 
 - You must be in an Owner role for at least one Enterprise Agreement (offer numbers: MS-AZR-0017P or MS-AZR-0148P) or Microsoft Customer Agreement or an individual subscription with pay-as-you-go rates (offer numbers: MS-AZR-0003P or MS-AZR-0023P).
 - For Enterprise Agreement (EA) subscriptions, the **Add Reserved Instances** option must be enabled in the [EA portal](https://ea.azure.com/). Or, if that setting is disabled, you must be an EA Admin of the subscription.
+- For CSP subscriptions, follow the steps in [Acquire, provision, and manage Azure reserved VM instances (RI) + server subscriptions for customers](/partner-center/azure-ri-server-subscriptions).
 
 ### To Purchase: