THRU.config
Thru. default.config is the configuration file that sets the MFT Add-in for Microsoft Outlook back to its default settings.
It is used when upgrading MFT Add-in for Microsoft Outlook for Outlook where the “set default” option is selected.
The file Thru. config stores the parameters set by the user and preserves the parameters when MFT Add-in for Microsoft Outlook is upgraded.