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Outlook 2003 with Exchange 2010

Posted on 2011-03-22
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Last Modified: 2012-06-27
Upgrading from Exchange 2003 Std to 2010.  Some clients still have Outlooks 2003.   Would there be any benefits upgrading to Exchange 2010 for Outlooks 2003?  Should they be upgraded to Outlook 2010 first?

Thanks.
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Question by:Tiras25
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Glen Knight earned 125 total points
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Outlook 2003 can still be used with Exchange 2010, in fact the SP1 for Exchange (included with SBS2011) turns off the  RPC encryption which prevents outlook 2003 from working in previous versions of Exchange 2010.

The benefits you would get from Outlook 2010 is the ability to access the archive mailbox through outlook.
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by:MegaNuk3
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Outlook 2003 in non cached mode is extremely slow with Exchange 2010, due to the lack of UDP notifications.

E2k10 SP1 RU3 addresses that issue and allows you to turn on UDP notifications again via the registry.

You don't need UDP notifications for outlook 2003 in cached mode.

Just remember that will need Public Folders for Outlook 2003 to download the OAB from and publish Free Busy to. If all your clients are Outlook 2007/2010 then you no longer need public folders.
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by:sgsm81
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If you have the means to upgrade to Outlook 2010 via say a subscription license (OVS or equivalent) then yes running the later version of Outlook ensures minimal problems with Exchange 2010.

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by:MegaNuk3
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BTW, E2k10 SP1 RU3 is still pulled(you can no longer download it), due blackberry message duplication issues after RU3 is installed
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by:Tiras25
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What about the large mailbox support?  Would it still work with Outlook 2003?  25 or 50GB mailboxes?  I didn't think so..
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by:Glen Knight
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There is no reason why not, the mailbox size could be that with older versions if exchange.
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by:Tiras25
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Got it.  So no mailbox size benefit.  Thank you!
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by:MegaNuk3
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Officially MS only supports 50GB PST/OST with Outlook 2010 & 20Gb with Outlook 2003/2007, but you can have larger...
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