Would you pls confirm the following (verbatim from KB) :-
- The account must be an Exchange Full Administrator (Exchange 2003), Exchange Organization Administrator (Exchange 2007), and Organization Management (Exchange 2010) at the top level of Exchange.
- The account must be a Domain Administrator. (Recommended, ensure that Domain Admins is a member of the Local Administrator's group on the Exchange Server)
- The account must have an active mailbox on the Exchange Server.
- The account must have received an e-mail via the mailbox.
- The account must have sent an e-mail via the mailbox.
- The account must be named so that it is unique within 4 characters.
- The account must be visible to the Global Address List, "Unhidden".
- Make sure the default system logon account of Backup Exec and Backup Exec Service Account are the same.