Update Rollup 1 for Exchange Server 2010 resolves issues that were found in Exchange Server 2010 since the software was released. This update rollup is highly recommended for all Exchange Server 2010 customers.
For a list of changes that are included in this update rollup, see KB976573.
Issues that the update rollup fixes
Update Rollup 1 for Exchange Server 2010 fixes the issues that are described in the following Microsoft Knowledge Base articles:
977439 (http://support.microsoft.com/kb/977439/ ) Exchange Server 2010 users cannot open certain attachments when they access their mailboxes by using Outlook Web App
977551 (http://support.microsoft.com/kb/977551/ ) Meeting requests that are sent to a room mailbox are not processed in Exchange Server 2010
977552 (http://support.microsoft.com/kb/977552/ ) Exchange RPC Client Access service crashes in the Handler.dll that is located on an Exchange 2010 Client Access service server
977553 (http://support.microsoft.com/kb/977553/ ) Exchange RPC Client Access service crashes in Parser.dll on the Exchange Server 2010 CAS server
977554 (http://support.microsoft.com/kb/977554/ ) The subject or body of a message that is hosted in an Exchange Server 2010 mailbox is not set as expected
977555 (http://support.microsoft.com/kb/977555/ ) The message body is inaccessible when the property conversion from PR_BODY_HTML to PR_BODY fails
977556 (http://support.microsoft.com/kb/977556/ ) The body text of an e-mail message is invisible after you create exceptions for a recurring appointment or for a recurring meeting by using a CDO application together with Exchange Server 2010
977557 (http://support.microsoft.com/kb/977557/ ) An E_FAIL error occurs when you create an exception to a meeting request by using a CDO application for a Microsoft Exchange Server 2010 mailbox
977558 (http://support.microsoft.com/kb/977558/ ) A folder name is not changed when you try to move and then rename the folder in an Exchange Server 2010 mailbox by using the CopyFolder method of the IMAPIFolder interface
977559 (http://support.microsoft.com/kb/977559/ ) The location of a meeting or an appointment is not updated on an Exchange Server 2010 mailbox
977560 (http://support.microsoft.com/kb/977560/ ) Update fails when you use a CDO application to update a recurrence task on Exchange Server 2010
977561 (http://support.microsoft.com/kb/977561/ ) VSS backup process stops responding when you try to perform a Volume Shadow Copy Service (VSS) backup for Exchange Server 2010 databases