Exchange CXP team has released Update Rollup 2 for Exchange Server 2010 RTM (KB 979611) to the download center.
KB 979611 lists all the fixes included in this rollup. Here are some of the product improvements and critical bug fixes we'd like to call out starting with a couple of IMAP improvements:
Customers may not install the rollup because they may feel that this should only be installed on an English Exchange Server. This was true for Exchange 2007 and is not true for Exchange 2010. When installing this rollup, the UI will be English and the “Add/Remove Programs” text will be English. We are expecting to release the other rollup installation language strings with the next rollup. We are finishing UI validation.
With Update Rollup 2 for Exchange Server 2010 RTM, we introduced a new parameter for the Set-ClientAccessServer cmdlet, CleanUpInvalidAlternateServiceAccountCredentials. Unfornately, the parameter cannot be used at this time. However the Set-ClientAccessServer cmdlet still functions with all other available parameters.
The cmdlet functions but not the parameter because of how RBAC works at the Organization\Enterprise level. The change functions as expected, except for this one issue. This issue blocks some functionality offered by this particular fix. We have a work around and we are currently performing testing and ensuring that we document it correctly. It will require running “Install-CannedRbacRoles” on one server after the rollup is installed. Once replication happens across the AD, the parameter will be available for use for the servers that have the rollup installed.
KB 979611 has more details about this release and a complete list of all fixes included in this rollup.
All credits kept from MS Exchange Team Blog