Update outbound calling prerequisites and licensing details

Clarified requirements for outbound calling and licensing changes for Teams Resource Accounts, including details on Communications Credits and Pay-As-You-Go licenses.

Author: henikaraa

articles/communication-services/concepts/interop/tpe/teams-phone-extensibility-connectivity-cost.md

@@ -73,7 +73,7 @@ Teams licensing requirements vary based on the calling scenario when Teams Phone
 
 ### Outbound calling prerequisites
 
-Starting **November 1, 2025**, Calling Plan licenses assigned to Teams Resource Accounts will no longer support On-Behalf-Of PSTN outbound calls or server-initiated outbound calls. A **[Pay-As-You-Go Calling Plan](/microsoftteams/calling-plans-for-office-365#pay-as-you-go-calling-plan)** and Communication Credits are required for these scenarios, based on the billing agreements.
+Starting **November 1, 2025**, Calling Plan licenses assigned to Teams Resource Accounts will no longer support On-Behalf-Of PSTN outbound calls or server-initiated outbound calls. Customers now need a financing balance, which can be provided by a  **[Communications Credits](/microsoftteams/set-up-communications-credits-for-your-organization)** license for legacy customers or telco overage for MCA customers. To activate a Communications Credits license, a **[Pay-As-You-Go Calling Plan](/microsoftteams/calling-plans-for-office-365#pay-as-you-go-calling-plan)** license is required as a prerequisite, since the Communications Credits license is an add-on. While telco overage can be set up without a PAYG license initially, the PAYG license must be acquired and assigned to the Resource Account for proper functionality. Therefore, customers must ensure the RA has a PAYG license along with either a Communications Credits license or telco overage.
 
 > [!NOTE]
 > Direct Routing numbers aren’t affected by these licensing changes.