Microsoft BizTalk Server 2006 R2 Service Pack 1 (SP1) is an update for BizTalk Server 2006 R2.  It includes fixes to issues that have been reported through our customer feedback platforms, as well as internally discovered issues.

It is available for download on the Microsoft Connect site to any customers that sign in to that site with their Live ID. Any feedback or issues you encounter can be reported here.
To see a listing of the customer-reported issues that are fixed in this service pack, click here.
For a description of some of the other updates included in this service pack, see What's new in BizTalk Server 2006 R2 SP1. For a list of of BizTalk Server hot fixes that are included in BizTalk Server 2006 R2 Service Pack 1 Beta click here.