I read somewhere once, years ago, that the "Do not import duplicate items" works by matching message ID's on a folder by folder basis. (Unfortunately I can't find the original reference now...)
So, if you have a message with ID {1234} in subfolder base1\A and run a second import with a new "root," say base2 ... then obviously the new subfolder (base2\A) will be empty and won't have any message ID's to match against... Hence the "duplicate" messages will be imported again to the second subfolder. This also works the same if you're doing an import, and the original folder has duplicate messages in different subfolders.. Say a copy of message ID {1234) exists in both base1\A and base1\B ... That message will imported twice and exist in both folders after the import. Unless something has changed in the past couple of years. :) Joe Pochedley From: pramatow...@mediageneral.com [mailto:pramatow...@mediageneral.com] Sent: Wednesday, September 14, 2011 7:34 AM To: MS-Exchange Admin Issues Subject: RE: Importing PST files Hope this makes sense, my mind is fuzzy this morning and not sure if I'm reading your question correctly :( I made two pst files called a1 and a2, containing the same messages. Created two folders called a1 and a2. I import a1.pst to folder a1, all messages and folder tree created, Then import a2.pst to folder a1 with "do not duplicate as the option, I didn't get duplicates. Do not import duplicate items Existing data will be kept, and the duplicate information in the file will not be copied to the current Outlook folder. Now if I import one of those pst's to folder a2, it does create dupes of what is in folder a1 - because it's a different Outlook folder. I'd think that'd be the same across all Outlooks and that Exchange version wouldn't matter; I did it with OL2003 and Ex2010. Paul From: Ellis, John P. [mailto:johnel...@wirral.gov.uk]<mailto:[mailto:johnel...@wirral.gov.uk]> Sent: Wednesday, September 14, 2011 6:41 AM To: MS-Exchange Admin Issues Subject: Importing PST files Exchange 2003/Outlook 2003 If a user has two or more PST files and these are imported into seperate folders in Outlook and you select the option Do Not Import Dulplicates will this stop two of the same messages being imported even if the they are going into seperate folders? Thanks John ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.clearswift.com<http://www.clearswift.com> ********************************************************************** --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist