Event ID 1000 Exchange 2010 RPC

Faulting application name: Microsoft.Exchange.RpcClientAccess.Service.exe, version: 14.2.318.4, time stamp: 0x5053beed

Faulting module name: exrpc32.dll, version: 14.2.318.4, time stamp: 0x5053be3a

Exception code: 0xc0000005

Fault offset: 0x0000000000108168

Faulting process id: 0x%9

Faulting application start time: 0x%10

Faulting application path: %11

Faulting module path: %12

Report Id: %13

It seems that clients are being desconnect from Outlook 2007 to Exchange during the time of this event.  I am running Exchange 2010 SP2 RU 4.  6000 Mailboxes.  Outlook is not running in cached mode.  OWA is unavailble for logins during the event.  Please let me know if you have any ideas as to what this is.

Thank you!