Microsoft Exchange Replication service crashes intermittently when you try to move mailboxes from an Exchange Server 2003 server to an Exchange Server 2010 server

Log Name:      Application
Source:        MSExchange Mailbox Replication
Date: Date
Event ID:      1121
Task Category: Request
Level:         Error
Keywords:      Classic
User:          N/A
Computer: Computer
Description:
The Microsoft Exchange Mailbox Replication service was unable to process a request due to an  unexpected error.
Request GUID: GUID 
Database GUID: GUID
Error: MapiExceptionNotFound: Unable to open entry ID. (hr=0x80004005, ec=-1601)

Log Name:      Application
Source:        MSExchange Common
Date: Date
Event ID:      4999
Task Category: General
Level:         Error
Keywords:      Classic
User:          N/A
Computer: Computer
Description:
Watson report about to be sent for process id: Process ID, with parameters: E12, Build Type, Version Number, MSExchangeMailboxReplication, M.Exchange.MailboxReplicationService, M.E.M.MoveBaseJob.<BeginJob>b__c, System.NullReferenceException, XXX, Version Number.
ErrorReportingEnabled: True

Log Name:      System
Source:        Service Control Manager
Date: Date
Event ID:      7031
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer: Computer
Description:
The Microsoft Exchange Mailbox Replication service terminated unexpectedly. It has done this XX time (s). The following corrective action will be taken in XX milliseconds: Restart the service.