We have officially finished our test passes against BizTalk Server 2009 and we are pleased to announce Commerce Server 2007 SP2 and Commerce Server 2009 are now certified for compatibility. More information on Biztalk Server 2009 can be found - http://www.microsoft.com/biztalk/en/us/default.asp
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To help clarify some questions around Commerce Server BizTalk support - Commerce Server 2009 does support BizTalk 2006 R2. We are currently doing test passes against BizTalk 2009 and will advise when our test passes are completed.
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