"Wrong journal email format" Exchange Synchronization error occurs during Journals Synchronization phase

SYMPTOMS

The following message is logged at ERROR level during Journals Synchronization phase:

Wrong journal email format. Subject: <EMAIL_SUBJECT>: System.Exception: Item is not an EmailMessage or has wrong attachment
 at ZyLAB.EDiscovery.Exchange.Standalone.ExchangeSync.ExchangeSyncHelper.CreateUnwrappedJournalItem(IJournalMailboxConfiguration journalMailboxConfiguration, Item journalItem, ErrorDetails& errorDetails)

CAUSE

The format of the Journal item is unexpected.

RESOLUTION

Investigation should be carried out focusing on the Journal mailbox in Exchange.

• There could be multiple possible causes for this error to appear:
• The original email or calendar appointment attached to the journal item was deleted
• The original email or calendar appointment attached to the journal item was corrupted
• A normal (non-journal) email is in the journal mailbox.

APPLIES TO

3.7; 3.7 Service Pack 1