The issue revolves around Non-Shortcut archived items that have been migrated from Domino to Exchange. When the evdominoexchangemigration tool is run against the destination Exchange mailbox it reports that these items were successfully converted. However, when the Exchange Mailbox archiving task then runs against these items it reports event ID 3412 falsely indicating that the evdominoexchangemigration tool needs to run against the mailbox again. This event will occur one time per mailbox regardless of the number of affected items in the mailbox. The following types of items have been verified to exhibit this issue: Draft Items, Calendar items, Tasks, and Chat history. Retrieval of these items from Outlook is not affected.
Event ID: 3412:The task found migrated Domino shortcuts in an Exchange Server mailbox that have not been processed by the post-migration utility.
This issue has been addressed as part of the following release:
Enterprise Vault 10.0.2 - Release Details
Note: If the affected environment is on Enterprise Vault 9.0 SP4, 10.0, or 10.0 SP1 then upgrade to Enterprise Vault 10.0 SP2 as this issue has been permanently resolved with Enterprise Vault 10.0 SP2.