Microsoft Exchange has reported an error regarding an SESC subscription. This article shows how to map the subscription information to a specific user being monitored.
1. Find the event from MSExchange Web Services in the Windows Application Event log on the CAS server. The following is an example:
Log Name: Application Source: MSExchange Web Services Date: 2/16/2012 11:09:28 AM Event ID: 22 Task Category: Core Level: Warning Keywords: Classic User: N/A Computer: Ex2010DC.2k8domain.test Description: An exception occurred while trying to read events for subscription [FwBleDIwMTBkYy4yazhkb21haW4udGVzdBAAAAAJ4VvqbKE1RKXWgVgLInM+te+PUOS6zgg=] against endpoint [http://sesc-3.2k8domain.test:8081/service.asmx]: Microsoft.Exchange.Data.Directory.SystemConfiguration.OverBudgetException: This operation exceeds the throttling budget for policy part 'CAS', budget type: 'EWS'. Suggested backoff time 19181 ms. at Microsoft.Exchange.Data.Directory.Budget.CheckOverBudget(CostType costType) at Microsoft.Exchange.Services.Core.PushSubscription.BuildNotification()
Save the subscription ID for later. In the example above the subscription ID is FwBleDIwMTBkYy4yazhkb21haW4udGVzdBAAAAAJ4VvqbKE1RKXWgVgLInM+te+PUOS6zgg=.