Exchange 2010 SP3 RU12 Released

The Exchange team today announced the availability of Update Rollup 12 for Exchange Server 2010 Service Pack 3.  RU12 is the latest rollup of customer fixes available for Exchange Server 2010. The release contains fixes for customer reported issues and previously released security bulletins.

Exchange 2010 SP3 RU12 Download

This is build 14.03.0279.002 of Exchange 2010, and KB3096066 has the full details for the release.  The update file name is Exchange2010-KB3096066-x64-en.msp.

Note that this is only for the Service Pack 3 branch of Exchange 2010.  Why?  Exchange 2010 SP2 exited out of support on the 8th of April 2014 and will no longer receive updates.  Customer must be on Exchange 2010 SP3 to receive updates.

Also note that Exchange 2010 transitioned into its Extended product support lifecycle phase on the 13th of January 2015.  Exchange 2010 will now be serviced as per the extended support policy


Issues Resolved


Important Notes

Now, before we rush off to download and install this there are a couple of items to mention!

  • Test the update in your lab before installing in production.  If in doubt test…

  • Ensure that you consult with all 3rd party vendors which exist as part of your messaging environment.  This includes archive, mobility and management services.

  • Ensure that you do not forget to install updates on management servers, jump servers/workstations and application servers where the management tools were installed for an application.  FIM and 3rd party user provisioning solutions are examples of the latter.

  • If the Exchange server does not have Internet connectivity then this introduces significant delay in building the Native images for the .Net assemblies as the server is unable to get to  To resolve this issue, follow these steps:

    1. On the Tools menu in Windows Internet Explorer, click Internet Options, and then click the Advanced tab.

    2. In the Security section, click to clear the Check for publisher's certificate revocation check box, and then click OK.

    We recommend that you clear this security option in Internet Explorer only if the computer is in a tightly controlled environment. When setup is complete, click to select the Check for publisher’s certificate revocation check box again.

  • Install the update from an elevated command prompt
  • Update Internet facing CAS servers first
  • Backup any OWA customisations as they will be removed

  • Uninstall any Interim Updates (IUs) before installing the RU.  You will have received these private files directly from Microsoft.

  • Disable file system antivirus prior to installing the RU.

  • Restart server after RU has been installed and then re-enable file system antivirus

  • Test (yes, technically this is in here for a second time but it is very important!)



Comments (11)
  1. thomas says:

    Why doesn’t it appear in WSUS?

  2. It will – you probably seen RU11 in there right now.


  3. Mark says:

    It’s in WSUS now.

  4. Scott Lerner says:

    Maybe a dumb question, but have been “gun shy” in the past with Roll-ups thus i’m several rollup’s behind only on RU4. Question, can I Just install Rollup 12 or do I need to install previous RU’s. Another words will all the fixes in previous roll-up get applied IF I just install RU12?

  5. Yes – installing Exchange 2010 SP3 RU12 will give you all of the prior fixes in the branch.


    1. Scott Lerner says:

      Rhoderick, thanks so very much for your quick response. RU12 didn’t seem that much larger than other RU’s so was not sure. I have been bit by some issues that have been resolved with some previous RU’s. Active Sync filling up Logs from an old iOS device and some OWA issues that I believe was resolved with RU7. Not fun when a MB store runs out of log space from a bad device.

      1. No worries Scott – the size difference is not much for the recent RUs as there are minimal changes. Exchange 2010 is in the extended support phase of its lifecycle. Compare the number of fixes in RU13 to RU3. There is a vast difference.


        1. is there any issue regarding RU 12?

  6. Jason Armentrout says:

    When I click the download link, it says page doesn’t exist. It seems like every link I try to click for a 2010 update it shows it’s broken?

    1. Let me ask around.


      1. Try now – working for me from multiple locations.


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