I am trying to build a community website with a main portal with shared information and child portals for individual regional workgroups with there own users and adminstration control.  I would like to have registered users be able to move back and forth between in the Main Portal and their Child Portal without having to re log in.

This must be a common situation with some sort of approach.

Any help would be appreciated,

Mike

That's the way it worked on my portal (which was 4.0.2) -- users with an authorized account on the root portal could log in at the root portal www.bringhome172nd.org and then click over to their personal sub-portal www.bringhome172nd.org/jakesmom (for example) and their login was persistent. (Site has since been taken down.)

I don't know which version you are using but I am using the Portal SSO product from WorkControl.
They have a version for DNN 3.x on their site and the DNN 4.x version is at Snowcovered.

As a new child portal is created I add the module to a hidden tab and in the settings I set the module to inherit logon ID's from the portal of my choice.  It works well.