Today the Exchange Team released Rollup 4 for Exchange Server 2007 Service Pack 3 (KB2509911). This update raises Exchange 2007 version number to 8.3.192.1.

Here’s the big list of changes included in this rollup:

• 2531208  You cannot synchronize a folder hierarchy by using Outlook for Mac 2011 in an Exchange Server 2007 SP3 environment
• 2528437  EWS applications cannot connect to Exchange Server 2007 servers after you make changes on accepted domains
• 2521063  You are incorrectly displayed as a meeting organizer after you synchronize the meeting by using your mobile device in an Exchange Server 2007 environment
• 2517337  You cannot open a mailbox that has a “#” character in the primary SMTP email address by using OWA in an Exchange Server 2007 environment
• 2515428  The MSExchangeMailboxAssistants.exe process crashes when the managed folder assistant tries to journal a message in an Exchange Server 2007 environment
• 2508872  The W3WP.exe process in the Autodiscover application pool on the Exchange Server 2007 Client Access servers consumes excessive CPU resources
• 2507374  “Cannot open this item” error message in Outlook online mode in an Exchange Server 2007 environment
• 2506827  An UM auto attendant times out and generates an invalid extension number error message in an Exchange Server 2007 environment
• 2502276  A meeting request series are deleted unexpectedly from the calendar in an Exchange Server 2007 environment
• 2498924  “Could not connect to a directory server” error message when you click the last page button in the search results in Exchange Server 2007 OWA
• 2498156  OLM/OLD incorrectly runs against databases in a RSG in an Exchange Server 2007 environment
• 2496806  A mobile phone times out when you use ActiveSync to synchronize the calendar on the mobile phone with an Exchange Server 2007 mailbox
• 2543879  A PDF attachment sent from a Mac Mail client does not display when you open the email message by using Outlook 2010 in an Exchange Server 2007 SP3 environment
• 2491751  Spell checking does not function correctly in OWA when an S/MIME control is used and SSL Offloading is enabled in Exchange Server 2007
• 2484147  “HTTP Error 400 Bad Request” error message when you use OWA to log on to a newly created Exchange Server 2007 mailbox
• 2466220  Question mark (?) characters appear in the subject of a reply email message in an Exchange Server 2007 environment
• 2223294  A new feature is available to disable the “No end date” check box in OWA when you create a recurring meeting item in an Exchange Server 2007 environment
• 977906  You receive an error message when you run certain commands in the EMS on an Exchange Server 2007 server
• 2495010  The EdgeTransport.exe process consumes 100% CPU usage on an Exchange Server 2010 Edge Transport server or an Exchange Server 2007 Edge Transport server
• 2484817  A mailbox does not show in certain address lists after you run commands on an Exchange Server 2007 mailbox

When running ForeFront Protection for Exchange, make sure you disable ForeFront before installing the rollup and re-enable it afterwards, otherwise the Information Store and Transport services may not start. You can disable ForeFront using fscutility /disable and enable it using the fscutility /enable command.

Note that update rollups are cumulative, i.e. they contain fixes released in earlier update rollups for the same product level (RTM, SPx). This means you don’t need to install previous update rollups during a fresh installation but can start with the latest rollup available right away.

You can download Exchange 2007 SP3 Rollup 4 here.