The Exchange Server 2010 SP3 Update Rollup 8 has been re-released.
Please read the following statement from the MS Exchange Team blog :
" Update 12/12/2014:
Exchange Server 2010 SP3 Update Rollup 8 has been re-released to the Microsoft download center resolving a regression discovered in the initial release. The update RU8 package corrects the issue which impacted users connecting to Exchange from Outlook. The issue was insulated to the MAPI RPC layer and was able to be isolated to quickly deliver the updated RU8 package. The updated RU8 package is version number 14.03.0224.002 if you need to confirm you have the updated package. The updates for Exchange Server 2013 and 2007 were not impacted by this regression and have not been updated.
Thank you all for your input on this post. Please find below the update published in The Exchange Team Blog :
" Update 12/10/2014:
An issue has been identified in the Exchange Server 2010 SP3 Update Rollup 8. The update has been recalled and is no longer available on the download center pending a new RU8 release. Customers should not proceed with deployments of this update until the new RU8 version is made available. Customers who have already started deployment of RU8 should rollback this update.
The issue impacts the ability of Outlook to connect to Exchange, thus we are taking the action to recall the RU8 to resolve this problem. We will deliver a revised RU8 package as soon as the issue can be isolated, corrected, and validated. We will publish further updates to this blog post regarding RU8.
This issue only impacts the Exchange Server 2010 SP3 RU8 update, the other updates remain valid and customers can continue with deployment of these packages.
We have also released Update Rollup 8,RU 8, for Exchange Server 2010 Service Pack 3.
To get the RU8 just follow this link :
The complete list of issues resolved in Exchange Server 2010 Service Pack 3 Update Rollup 8 is described in KB 2986475