About Logon account for deduplication storage in BE 2012

Refer to Best practices for Backup Exec 2012 Deduplication Option ,URL:http://www.symantec.com/business/support/index?page=content&id=HOWTO74446

One requirement is to use a dedicated logon account when creating a deduplication disk storage device.

I want to ask whether it can create BE Logon account only for deduplicatio storage without creating local windows account in BE 2012.

or it must create local window account (e.g. dedup_user) and create BE logon account (e.g.dedup_user)