I *believe* I have finally cracked this nut... My sample group is a bit small, but I've gotten 3 different computers to stop with multiple authentication and prompt only once per session.
Things to note:
1) Be sure that you have the latest version of ActivClient and that it is patched for the appropriate version of the OS. ActivClient updates can be found on this site:
http://militarycac.com/activclient62update.htm2) Be sure that the "Advanced Configuration Manager" is installed. All systems that were having multiple pin prompts did *not* have the "Advanced Configuration Manager". If it is not installed then uninstall ActivClient and reinstall. Be sure that it is included in the install process by running the "Custom" install option.
3) After the software has been installed along with the "Advanced Configuration Manager" right click on the ActivClient system tray icon and go to "Advanced Configuration Manager". Choose the "Pin Caching Service" section. Be sure that the "Enable 'Include' application list" setting is set to "Yes" and that the "Enable 'OpenCard' application list" setting is set to "yes".
4) Double click on "Applications 'included' in PIN caching". The "Included" application list will pop up.
-Be aware that Windows 7 32 bit and Windows 7 64 bit have slight differences in their "Program Files" paths
-Windows 7 64 bit has a "Program Files (x86)" folder along with a "Program Files" folder
-Windows 7 32 bit has only a "Program Files" folder
5) Add the path to the Internet Explorer executable into the "Included" pin caching list then click "OK"
-32 Bit: C:\Program Files\Internet Explorer\iexplore.exe
-64 bit: C:\Program Files (x86)\Internet Explorer\iexplore.exe
6) Double click on "Applications 'optimized' for PIN caching". The "Optimized" list will pop up
7) Add the path to the Internet Explorer executable into the "Optimized" pin caching list
-32 Bit: C:\Program Files\Internet Explorer\iexplore.exe
-64 bit: C:\Program Files (x86)\Internet Explorer\iexplore.exe
The user still seems to be prompted multiple times when opening a document from the site. No ready solution for that, but it is typically 3 prompts max.
The system will prompt you to reboot.
Thus far these steps have resolved the multiple pin prompts on both 32 bit 6.2.0.122 and 64 bit 6.2.0.133 (I believe it's .133). I have not tested this with the latest release. I found the following documentation to be incredibly helpful in troubleshooting this issue:
https://www.navyreserve.navy.mil/helpdesk/Helpdesk%20Library/ActivClient%206.2%20Installation%20Guides/ActivClient%20Administration%20Guide.pdfHope this post helps the rest of you all out there! Please add to this thread if you find more technical issues or solutions.