I have a portal I am setting up on our local intranet and have AD authentication set up within my version of DNN (4.7) and it works great.  What I want to do now is set up limitatios on who can and cannot login to this site.  Right now there are about 20 people who should have access, in the future (month and a half or so) there will be about 200.  I do not know much about AD, which is the reason I ask.  I also need to work out the people who have admin access within AD do not have admin access within the portal. 

Any suggestions?

Thanks for being a trooper Mike!  Hope the surgery went well and it wasn't life threatening.

What I think I am understanding is I need to set up the 200 or so people in a specific group and give that group access to all the pages or portal, and deny the rest, correct?  Bad part is this is still a pretty manual process to add the users, any way to automate it?

Once again my lack of knowledge with AD is going to show; I took a look at our domain and the actual group of people is down about 4 levels deep.  (Domain>Group>Sales>SalesReps) So would my group be called exactly the same as the last group or how would that be set up in DNN?  Do you have any good reading (books or posts) which I could reference?