Update Rollup 12 for Exchange 2007 SP3 – KB2903911

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Microsoft released RU12 for Exchange Server 2007 SP3.

You can find this update here

As always for Exchange 2007 you can download 32bit or 64bit version of this update depending on your system version.



When you install RU12 for Exchange 2007 SP3 you will get exchange version number: 8.3.342.4

More informations about this update you can find here: KB2903911



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2 Responses to Update Rollup 12 for Exchange 2007 SP3 – KB2903911

  1. Prabhu S says:

    Few Blogs mention OWA issues after E2k7 SP3 RU12…


    fix is also mentioned by GTR in comments..

    need to plan this implementation carefully….!

  2. Tristan says:


    Just wondering if someone reported an issue that unexpected reboot occurred after installing the this rollup update?

    This update installed on all of our 2007 exchange servers SP3 running on Windows 2008 x64, all are clustered servers. After a week, 4 out of 8 servers encountered unexpected reboot (27Dec) almost simultaneously, then on 10Jan2014 all of 8 servers were rebooted unexpectedly same thing. Thank you

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