Hi It is by design. You can read team blog of it. Single Instance Storage in Exchange 2007 TechNet Subscriber Support in forum If you have any feedback on our support, please contact tnmff@microsoft.comTerence Yu TechNet Community Support

Hi Do you have anything update on your issue?Terence Yu TechNet Community Support

As many of you know GroupWise does a great job with attachments. If I was to send an email to all employees with an attachment this attachment would only be store on the server ONE time. Exchange, however, stores it for every intance, email address. Is there a way to have one instance of the attachment on the server no matter how many users it is sent to within our company?Thank you, Frank Brown NextGen NCP IT Network Administrator

Exchange 2007 and earlier has Single Instance Storage built in, i.e. if a message is received for say 100 people and all 100 people have mailboxes within the SAME EDB then the attachment is only stores once and the recipients are linked to that item. However if any of the 100 are located within a different database then a copy of that attachment must be saved in the database as well. NOTE: Starting with Exchange 2010 Single Instance Storage is no more so each recipient stores a copy of the attachment. Troy Werelius www.Lucid8.com Search, Recover, & Extract Mailboxes, Folders, & Email Items from Offline EDB's and Live Exchange Servers with Lucid8's DigiScope

Hi It is by design. You can read team blog of it. Single Instance Storage in Exchange 2007 TechNet Subscriber Support in forum If you have any feedback on our support, please contact tnmff@microsoft.comTerence Yu TechNet Community Support