One copy, multiple pointers. Single Instance Storage (SIS) it is called. -----Original Message----- From: A. Michael Salim [mailto:msalim@xxxxxxxxxxxx] Sent: Monday, May 02, 2005 9:50 PM To: [ExchangeList] Subject: [exchangelist] same attachment copied to multiple recipients http://www.MSExchange.org/ Hi, If a user sends an email with an attachment to multiple recipients on the same Exchange server, does each recipient get a separate copy of the attachment in their Exchange mailbox, or does the Exchange server store just one copy and let each user have at the same file? Presumably, eventually each user gets their own private copy when they download into Outlook, I am curious what happens between the time the sender sends the attachment and the recipients download it. Mike