mailbox becomes empty after migrating to office 365

Hi there,

I just migrated one mailbox to Office 365 but that mailbox became empty after migrating to office 365. that mailbox had several personal folders. I have migrated more than 500 mailboxes but these mailboxes migrated successfully without any issues. Mailbox ussage is 46.69 MB.

Please assist me in this case.

Thanks,

Long