We recently migrated from WSS 3.0 to SharePoint 2010. We have users that have been accessing the site for years to open and download pdf files. With the old site when the user clicked on a pdf it would open up in Adobe (or whatever pdf viewer they use). With the new site it does one of two things. It will either prompt them to save the file, which is ok or, it will prompt them for a password even though they have already logged into the site.
I don't really want a fix that requires making changes to the web browser. I had rather be able to make a change in Sharepoint 2010 or IIS if possible that will allow this to work more seemlessly. Can someone help me with this? thanks