A customer is concerned that re-migrating mailbox data in Quest ODM after enabling AutoForwarding with the “Leave a copy" in the source mailbox option may result in duplicate email items appearing in the target mailbox.
Re-migrating mailbox data in Quest ODM does not create duplicate mail items when AutoForwarding with “Leave a copy” is enabled, provided the migration is performed as an incremental remigration.
Quest ODM uses a hidden watermark to detect previously migrated items. During remigration, ODM migrates only new or missing items and skips emails that have already been migrated, even if they were auto forwarded.
Important Notes
a. The target mailbox was deleted and recreated
b. A full remigration or mailbox reset was performed
c. Message metadata was altered manually
d. Custom Folders or Date Filters configured, but Mail Sync (incremental sync) functionality is disabled.
Best Practice:
