Ingest an Outlook email or archive that contains a "blank" date field. After exporting from Forensic Tools, the date shows as 1/1/4501.
According to Microsoft, the date field can never be stored as blank or NULL. If no value is written to the field, the value will default to 1/1/4501.
For more information see:
Microsoft Outlook 2007 Programming: Jumpstart for Power Users and Administrators by Sue Mosher, "Working with dates and times" pg 207
There technically is no resolution to this issue as this is working as designed by Microsoft.