TwoConnect Loopback Adapter – Free Download
The Loopback Adapter is a native Send Adapter that returns the submitted Message unchanged on a Two-Way port. The adapter supports BizTalk 2010 and BizTalk 2013. When configured on a One-Way Send Port, it behaves as a null endpoint.
To install, run LoopbackAdapter.msi. After setup completes run loobackAdapter.reg at both a 32-bit and 64-bit Command Prompt. Then register the Adapter in BizTalk Administrator.