unable to restore migrated mailbox

Hello,

I have a issue ,  our Exchange server 2003 was migrated to 2010 , and works fine.

The backup job (grt) works fine also

I discovered when i try to restore an email of mailbox migrated  , the restore job works , but no emails are present in the outlook.

When i retry with a mailbox created by exchange 2010 , there are emails

Can you help me please ?

Thanks for you help

Fafatech