If you don't want the emails in your Microsoft Outlook Sent folder with a luggage tag to be saved to iManage Work, set the Enable Sent Items Filer option to false. This means that though you use the Send and File feature and a luggage tag gets added to the emails, none of the emails get filed and the Filed to iManage label won't appear for them.

With the option set to true (default value), Sent items filer monitors all emails in your Sent items folder for a luggage tag and files them to the iManage Work location indicated by the luggage tag.

Example:

<key>Enable Sent Items Filer</key>
<true/>