Have you all obtained the ndOffice 2.0 beta? It has a per user filing indicator for emails. Our goal with ndOffice 2.0 and 2.1 is to complete the features that were available in EMS Profiler with the long-term attempt replace its features within an integrated suite of features for Microsoft Office and common user interface. The full feature set for an upgrade from EMS Profiler to ndOffice will be realized with ndOffice 2.1. However, there are some features already added to 2.0 that you can either test and use live or turn them off in the registry and wait for 2.1.
As to a global filing indicator where one user knows whether another user has already filed that email is a feature of NetDocuments EM ndOffice 2.1 will not offer that specific ability, among other more advanced features, without the combination of EM and ndOffice. Please check out ndOffice 2.0.