Updated: Update Rollup 8 v2 For Exchange 2010 SP3 (KB2986475) Released

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.

Check: http://blogs.technet.com/b/exchange/archive/2014/12/09/exchange-releases-december-2014.aspx

Updated: Update Rollup 8 v2 For Exchange 2010 SP3 (KB2986475) has been released

Security update available for Exchange 2007, 2010 and 2013

Microsoft has released a fix for Outlook Web App in all supported versions of Exchange.
In all cases, it comes to security issues that have been designated as Important.

Four security updates are also those offered by Microsoft Update, but here are the manually download links:

Rollup 15 for Exchange Server 2007 Service Pack 3
Rollup 8 for Exchange 2010 SP3
Security Update For Exchange Server 2013 SP1 (KB3011140)
Security Update For Exchange Server 2013 CU6 (KB3011140)
Cumulative Update 7 for Exchange Server 2013 (Provided not with Windows Update)

Versions that are not listed here are no longer supported or are not vulnerable. For more information read the security bulletin MS14-075: Vulnerabilities in Microsoft Exchange Server Could Allow Elevation of Privilege (3,009,712)