We have an Exchange 2010 SP1 and an Exchange 2003 SP2 servers in our organization.
I have successfully moved all mailboxes from 2003 to 2010. Only six mailboxes completed with this warning:
Warning: Failed to cleanup the source mailbox after the move.
Error details: MapiExceptionNotFound: Unable to delete mailbox. (hr=0x8004010f, ec=-2147221233)
Shall I discard this warning and clear move requests?
BTW, I am going to remove the 2003 server later.