HI I have a SBS 2008 running exchange 2007 and my clients are using blackberry 9000's, the problem that they are having is that when they set up their email on their blackberry using BIS as IMAP or POP3 on blackberry.orange they recieve multiple emails when they open their outlook, read email or search their email either in the office (set up as exchange) or at home (set up as pop3). If they set it up using OWA e.g. https://mail.domain.co.uk they don't get duplicates however thay cannot send calendar invites from the blackberry. Do you have any suggestions? Thank you Mahesh

Hi Mahesh , I think this will solve your problem. http://www.blackberryforums.com.au/forums/blackberry-8800-smartphone-discussion/1636-duplicate-email-problems.html Regards. Shafaquat Ali.M.C.I.T.P Exchange 2007 M.C.I.T.P Windows Server 2008 M.C.T.S OCS Server 2007 R2

Hi Shafaquat how do I ensure that the message UIDs of email messages on the integrated account messaging server do not change. Regards Mahesh

do you have set leave a message on server check?

Hi yes we have. Also the problem seems to happen when accessing OWA aswell i have seen many forums where people have had the same problems but have not not posted a solution. Regards Mahesh

Hi how do I ensure that the message UIDs of email messages on the integrated account messaging server do not change. Regards Mahesh

Hi Guys this is my first pos on the forum ans I live in New Zealand (FYI) I have stumbled onto the resolution to the Duplicate emails in BB after days of searching and testing. I have added a entry into Regedit on the blackberry server a few days ago to resolve one issue. Two days later I started to receive complaints about duplicate messages on the BB's. Rolled back on the change and issue resolved. I have tested on a live environment I have tested and it is working This is only for BES and outlook 1. In the Registry Editor, go to one of the following locations: For BlackBerry Enterprise Server 2.1 and earlier: HKEY_LOCAL_MACHINE\Software\Research In Motion\BlackBerry\Server For BlackBerry Enterprise Server 3.5 to 3.6: HKEY_LOCAL_MACHINE\SoftwareResearch In Motion\BlackBerry\Servers\<BlackBerry_Enterprise_S erver_name> For BlackBerry Enterprise Server 4.0 to 5.0: For Windows 32-bit OS: HKEY_LOCAL_MACHINE\SOFTWARE\Research In Motion\BlackBerry Enterprise Server\Agents For Windows 64-bit OS: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Research In Motion\BlackBerry Enterprise Server\Agents *** If the ProcessMailDelay registry entry already exists, change the Value data field to the number of seconds you would like mail processing to be delayed. If the ProcessMailDelay registry entry does not exist, create a registry entry with the following values: Name: ProcessMailDelay Type: DWORD Value: This value specifies the number of seconds to delay email processing. For example, a value of 45 delays mail processing for 45 seconds. (decimal to 45) 3.Set Decimal to 45 4. Restart the BlackBerry Dispatcher and BlackBerry Controller. Important: Restarting certain BlackBerry Enterprise Server services delays email message delivery to BlackBerry smartphones.