After migration, and during updating Calendar, an error is generated as follows:
This message could not be sent. Try sending the message again later, or contact your network administrator.
You do not have the permission to send the message on behalf of the specified user.
Error is [0x80070005-0x0004dc-0x000524].
Check/Correct attributes like LegacyExchangeDN that are used as x500 address
ODME is designed to only migrate mailbox contents from source mailbox to target mailbox. It does not create or update target mailbox for you. Before migration, you need to prepare the target mailbox. The LegacyExchangeDN attribute is exchange mailbox's attribute in AD. ODME would not migrate those attributes from source to target. However Quest has an other product called MMEX that can support those attributes from source to target.