Environment
Retain 3.x
Exchange Module
Office365
Situation
I've found blank messages while searching my Retain mailbox. Is my database corrupt? Have I lost data?
Resolution
We have found that when Retain archives from Office365 that there are items stored that look like blank messages that you can search but cannot get into since there is no from, subject, or recipient.
After investigation we have found that these items are in special subfolders of the Recoverable Items folder of the user's mailbox. For example Audits.
We believe them to be audit trail files Exchange is using for its own purpose and is not anything to worry about.
Additional Information
This article was originally published in the GWAVA knowledgebase as article ID 2587.