Error: "Unexpected error on source mailbox . The response received from the service didn't contain valid XML."
説明
During mailbox migration, task is generating an error: "Unexpected error on source mailbox <email>. The response received from the service didn't contain valid XML."
原因
Source mailbox autodiscovery got resolved to the old version of on-premises Exchange
対策
Verify an autodiscovery response of <email> address that it's physically located in the Microsoft Exchange Online (O365) and not pointing to on-premises Exchange. ODM does not support migrating on-premises Exchange mailboxes to the cloud.
