For each user in FYI, the items in the Inbox and Sent folders in Outlook are monitored by the AutoFile process, which runs approximately every 15 minutes. Emails will be automatically imported into FYI and filed depending on your AutoFile settings.
When the AutoFile process runs, the Last Modified date is reviewed, and if the date has been modified since the last time the AutoFile process ran, the email will be imported to FYI. Refer to Introduction to Email AutoFile
Note: This Last Modified date is managed by Microsoft. FYI does not have visibility over what event occurred to trigger the date to be changed.
If emails have been imported that are not required, they can be deleted from the In Tray. Refer to Managing your In Tray