Xerox 480 ST System Administration Manual page 264

Multiple Logins
More than one Document Centre can transfer files to different
repositories in the same file server at the same time. This is similar
to more than one user logging into a file server at the same time to
transfer files to different directories.
Existing Accounts
A Document Centre can use an existing user account if the account
is enabled for multiple logins. The account for the scanner is no
different from a user account. It is a user account!
Logging in to Multiple File Servers
The same Document Centre can log into more than one file server
and transfer a file to a document repository, but not at the same time.
This is similar to a user logging into more than one file server. The
scanner requires accounts in all file servers that it needs to access.
Page 20 - 14 Xerox Document Centre System Administration Guide