We have also released the Update Rollup 11 for Exchange Server 2007 Service Pack 3. You can see the related information here :
Description of Update Rollup 11 for Exchange Server 2007 SP3http://support.microsoft.com/kb/2873746
The download link is :
Download Update Rollup 11 for Exchange Server 2007 Service Pack 3 (KB2873746) from Official Microsoft Download Centerhttp://www.microsoft.com/en-us/download/details.aspx?id=39803
There are multiple files available for this download. Once you click on the “Download” button, you will be prompted to select the files you need.