I have a small environment: one Backup Exec Media server and one Tape library.  Because of this in 12.5, I did not need, purchase, or install the Shared San Storage option.  I am now trying to update my Backup Exec server to 2010.  During the installation, it stopped telling me that it needed the SSO agent after I installed all of the license keys.  If I took out the license keys, proceeded with the installation, I noticed that it defaulted to using the SSO option and I couldn't deselect it.  Symantec wants me to uninstall all 12.5 license keys, install 2010 and then install the new 2010 license keys.  Why would it default to requiring hte SSO option if I don't need it and haven't been using it???  Just as a piece of background, my disk storage and tape library connect to the server via Fibre Channel and are not shared storage.  Symantec support couldn't say why it was defaulting to this configuration and wants me to try a workaround that is both long winded and not guaranteed to work.