Error was found for <user name> (<address>) because: Error occurred in the step: Moving messages. Failed to copy messages to the destination mailbox store with error:
MAPI or an unspecified service provider.
ID no: 00000000-0000-00000000, error code: -1056749164
Additionally, you find the following event in the Application logs:
Event Source: Exchange Migration
Event Category: Move Mailbox
Event ID: 1008
Description:
The move-mailbox task for mailbox '<name>' failed.
Error: Failed to copy messages to the destination mailbox store with error:
MAPI or an unspecified service provider.
ID no: 00000000-0000-00000000