2007 Service Pack 1 Beta is available for download via TechNet and MSDN. Both the 32-bit and 64-bit versions of Exchange Server 2007 SP1 beta can be accessed through TechNet. At this point in time, MSDN users may be experiencing problems with the x86 version of Exchange Server 2007 SP1 beta.
Microsoft has made the Release Notes for Exchange Server 2007 SP1 since March. The notes will provide comprehensive guidance through the new features that SP1 will bring to the table but also on how to install the service pack, the issues that customers are most likely to face and the adjacent workarounds.
The release of the first beta for Exchange Server 2007 SP1 was announced since back in February by representatives of the Microsoft Exchange Team. According to Microsoft, Exchange Server 2007 Service Pack 1 will be made available in the second half of 2007.