BizTalk Error – Please verify that the receive location exists, and that the isolated adapter runs under an account that has access to the BizTalk databases.

The Messaging Engine failed to register the adapter for “SOAP” for the receive location {Location}”. Please verify that the receive location exists, and that the isolated adapter runs under an account that has access to the BizTalk databases.

As this is a permission issue, the error occurs because the web service is running on the application pool which security account user is not a member of the BizTalk Isolated Host Users group.

To solve this issue, check the application pool security user account in the IIS. Add that user account into the BizTalk Isolated Host Users group. Or change the application pool to the pool which user is already a member of the BizTalk Isolated Host Users Group.