Moving mailboxes completed with warning

Hello experts,

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.
Who is Participating?
stanley_starsConnect With a Mentor Commented:
See this thread:

It appears to be benign and the mailbox will be removed upon your mailbox cleanup task.
RadweldConnect With a Mentor Commented:
You can perform mailbox cleanup manually to ensure the legacy data has been purged.
Madan SharmaConnect With a Mentor ConsultantCommented:
Check those mailboxes on exchange 2010. if those are with their complete data then you can manually clean up the mailboxes from exchange 2003.
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