Could not establish secure channel for SSL/TLS for SOAP call

Question

Our core server is calling out to a soap web service over https on a number of different servers to confirm that a transaction has completed.

The code is dotnet 3.5

Answer 1

I got the same error "Could not establish secure channel for SSL/TLS with authority 'www.xyzzy.com'." when moving an existing application including a required client certificate from one server to another. What caused the problem on the new server was that the IIS-user, in this case "IIS_WPG", didn't have have read & execute permission for the certificate just moved to the new server. Changing the certificate access permissions can be done with wsetools. /Stefan