Event ID 4009 MS Exchange Availability
Process Microsoft.Exchange.InfoWorker.Common.Delayed`1[System.String]: Unable to open connection for mailbox <Teddy Borg>SMTP:Teddy.Borg@varian.com. Exception returned is: Microsoft.Exchange.Data.Directory.SystemConfiguration.OverBudgetException: This operation exceeds the throttling budget for policy part 'RPC', budget type: 'EWS'. Suggested backoff time 177 ms. at Microsoft.Exchange.Data.Directory.Budget.CheckOverBudget() at Microsoft.Exchange.Services.Core.Types.EWSBudget.CheckOverBudget() at Microsoft.Exchange.InfoWorker.Common.Availability.ClientContext.CheckOverBudget() at Microsoft.Exchange.InfoWorker.Common.Availability.CalendarQuery.GetDataInternal(FreeBusyQuery freeBusyQuery, EmailAddress emailAddress). Any help would be appreciated Thanks in advance Abhijeet Abhijeet D
March 11th, 2013 5:31am

Hi , Based on the error information, it seems the RPC connection time exceed the throttling, please check your throttling setting. Message Throttling: http://technet.microsoft.com/en-us/library/bb232205(v=exchg.150).aspx similar issue for your reference. Can't get the CalenderEventDetails of an Room Mailbox in Exchange Server (EWS) [Code available]<//span>: http://social.msdn.microsoft.com/Forums/en-US/exchangesvrdevelopment/thread/cc7d3101-b473-4a61-b487-9bb77ddf777a Wendy Liu TechNet Community Support
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March 12th, 2013 3:06am

Hello Wendy, Thanks for your reply. I will check the articles and see how it goes. Will update once made changes. Thanks, Abhijeet DAbhijeet D
March 12th, 2013 3:19am

Any update ?Wendy Liu TechNet Community Support
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April 4th, 2013 2:09am

We upgraded to RU6 for exchange 2010 SP2 and we dont have this issue anymore. Thanks for your updates.Abhijeet D
April 4th, 2013 1:34pm

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