Link TC follow-up timestamp in Outlook to TFS date field
At the moment you can use TC to flag an item in Outlook with a follow-up date/time. http://www.teamcompanion.com/blog/archive/2013/09/11/organize-your-schedule-around-tfs-work-items.aspx
However, this value is "implemented with Outlook infrastructure behind the scenes, connected only to the representation of the work item in that particular TeamCompanion query" and it not visible to TFS itself.
I think it would be really useful if this value can be mapped through to a TFS field, then it would be visible and queryable by all.