Unlimited!  Quest is set up to support and track Multiple Users including sales activity by each.

This applies to both a standalone installation (Quest running on a single machine) and Client - Server installation (V6.1 only).  Quest can be set up in a Client - Server environment on your local network (wireless as well) allowing up to 5 Staff members computers in your Studio to be connected to the same database.  The Client - Server installation and configuration would have to be set up by someone locally however; it is not difficult and could be done in about 30 minutes but due to the diversity of LAN environments and skill levels of our customers we do not have the resources to assist with this type installation.

This works over wireless local area networks as well, I have personally used Access in a Client - Server wireless environment for years accurately managing and tracking multi million dollar annual budgets.

If you are interested in how to set up a Client - Server install take a look at the Microsoft Office "How to Split a database" instruction