In the app event log on Exchange Server 2007, I keep getting these warnings: Log Name: Application Source: MSExchange Web Services Date: 12/22/2009 12:21:28 AM Event ID: 6 Task Category: Core Level: Warning Keywords: Classic User: N/A Computer: xxxx.xxxx.com Description: Unable to send a notification for subscription GgB3aWF3czIud2F0c29uaW5zdXJhbmNlLmNvbRAAAABiyI5fi2GGQooEdxjGXgss. (Send attempts: 7) Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="MSExchange Web Services" /> <EventID Qualifiers="32768">6</EventID> <Level>3</Level> <Task>1</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2009-12-22T05:21:28.000Z" /> <EventRecordID>8977</EventRecordID> <Channel>Application</Channel> <Computer>xxxx.xxxx.com</Computer> <Security /> </System> <EventData> <Data>GgB3aWF3czIud2F0c29uaW5zdXJhbmNlLmNvbRAAAABiyI5fi2GGQooEdxjGXgss</Data> <Data>7</Data> </EventData> </Event> I've searched, but haven't found any resolution. I think it must have something to do with iPhone or BlackBerry devices, but I have no idea how to resolve. Any ideas?

Basically Event ID 6 tells us that a device/client is subscribing a server event, but when the server when to notify the client/device, the client is not there to respond to it, so the server threw and error and close the subscription. DeVa, M.S., {MSFT}