Exchange 2010, Outlook 2003 UDP notifications are back

Exchange 2010 has been criticised for appearing to be slow for Outlook 2003 clients, that’s another way of saying that customers didn’t rush out and update Outlook to the latest versions as they became available.

Outlook 2003 users would complain that messages would only appear on a minute boundary, and generally they hand held derives would receive new message notifications before they did.

Outlook 2003 used UDP notifications from the Exchange server to notify clients of messages as they arrived, note that the biggest impact here is users running in online mode,  not cached mode. Users with very large mailboxes running in online mode and/or terminal services users would have been the worst affected.

Fear no more, kb 2009942 releases detail available after the installation of Update Rollup 1 for Exchange Server 2010, presenting new configuration parameters in the registry.

That, along with the news of Exchange 2010 service pack 2 and the GAL segmentation improvements coming later this year, along with a number of other posts on the Exchange teams website, has made it an interesting week in the Exchange community.

Nicolas Blank

Nicolas is an Architect, author, and speaker focused on all things Exchange and Cloud at NBConsult. With over 16 years of experience on Exchange, Nicolas consults to customers globally on cloud based and on-premises Exchange as well as ISVs building Exchange focused products. Nicolas has extensive experience using Azure to create public and private Azure based offerings leveraging cloud based principles and common sense. Nicolas currently holds status of MCM Exchange 2010, Office 365 (Microsoft Certified Master), MCSM Exchange 2013, and has been awarded Microsoft MVP (Most Valuable Professional) for Microsoft Exchange since March 2007. Nicolas has co-authored "Microsoft Exchange Server 2013: Design, Deploy and Deliver an Enterprise Messaging Solution," published by Sybex. Nicolas blogs regularly on Exchange and messaging topics at, tweets at @nicolasblank, and is the founder of and a contributor to IT Pro Africa and @itproafrica

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