WARNING: [4051-209-4-00000000]Unable to migrate delegate '~DEFAULT' or '~ANONYMOUS'.
Either no Active Directory or could not find the Delegate in Active Directory.
DEFAULT And ANONYMOUS are Domino account and are not present in Active Directory (AD)
This Warning may be seen in the log file if the specified user does not exist in Active Directory at the time of the Mailbox Migration. Delegates on the mailbox are dependent on whether or not the users exist and cannot place delegates unless the user exists.