ERROR: [4953-23-23-8004010F] Unable to open target address book container USERNAME.
MAPI error 8004010F
Error: The client operation failed.
Component: Microsoft Exchange Information Store
Low level error: 8004010F
Towards the end of the address book migration, it is logged in the log file that the migration is completed successfully.
Finished migrating file Address books.
Migrated 1000 item(s) with 0 error(s).
1000 item(s) moved, 0 filtered.
Groupwise Migrator for Exchange (GME) uses the Messaging Application Program Interface (MAPI) client to access the mailbox during the migration. When the network is slow and/or the migration machine temporarily loses connection with the Exchange server, this error is logged by the MAPI client.
There is usually no data loss since the GME had already re-established the connection.
The connection did actually get lost, but GME restored the connection and attempts to remigrate the address book.
Refer to the wlog file at the end of the address book migration section to confirm if the migration is indeed successful.