Earlier today the Exchange CXP team released an updated version of Update Rollup 4 for Exchange Server 2010 SP1 to the Download Center. This updated release is being made available after a complete review and revalidation of the list of fixes included in the previously released version of Rollup 4 dated June 22, 2011.
The review completed by the Exchange CXP team determined that the issue identified in ‘KB 2581545: The copy or move operation on a folder that contains subfolders does not work as expected after you install Update Rollup 4 for Exchange Server 2010 SP1 dated June 22, 2011’ introduced a serious regression in the original release of Rollup 4. As a result, a new version of Rollup 4 dated July 23, 2011 has been tested and released with the change that caused the regression removed. The re-release of Rollup 4 is tracked by ‘KB 2579150: Description of Update Rollup 4 for Exchange Server 2010 Service Pack 1′.
