Volume editions of Office 2010 don't have an RFM.
In RFM Office, documents can only be viewed but not modified. Retail versions of Office 2010 will only run in Reduced Functionality Mode (RFM) after the grace period of 30 days has been exceeded. Rearming Office 2010, that is resetting the grace period, works similar as rearming Windows. However, Office 2010 behaves a little different than Windows if it is not activated. However, compared to Office 2007 it has one major drawback: Like Vista and Windows 7, Office 2010 has to be activated. Office 2010 is certainly the best Office suite out there. This article explains how you can rearm Office 2010 and for what you need this feature.
