Symptoms
The Microsoft Exchange Server 2010 address book service crashes intermittently with the following 4999 event:
M.E.AddressBook.Service, M.Exchange.Rpc, M.E.R.R.RfriRpcOperationBase.Complete, System.ArgumentException
Resolution
To resolve this issue, install Update Rollup 10 for Exchange Server 2010 Service Pack 3.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
