Hello,
You can upgrade to either 9.1 or 10.0. You will need to upgrade all the agents and options.
Here are the details about 9.1. It addresses many issues and enhancements from an earlier versions and Build of Backup Exec . Refer the following technotes:
Title: VERITAS Backup Exec (tm) 9.1 for Windows Servers revision 4691.1 (Single .ZIP download)
http://seer.support.veritas.com/docs/264658.htm
Title: VERITAS Backup Exec (tm) 9.1 for Windows Servers General Information
http://seer.support.veritas.com/docs/262414.htm
The upgrade from 8.6 to 9.1 or 10.0 too will be a paid upgrade.
-Update all agents/options on all remote systems.
Check the following for 10.0:
Upgrading from Backup Exec 7.x for Windows NT to Backup Exec 10.0 for Windows Servers
http://support.veritas.com/docs/265163
You can contact our sales team for issues related to licensing and purchases at:
http://www.veritas.com/contactus/ContactUsHome.jhtml
Note : If we do not receive your reply within two business days, this post would be marked ‘assumed answered’ and would be moved to ‘answered questions’ pool.
Regards.