Error When Creating an Appointment in Nintex Workflow 2010

When you run the workflow, you get the error:




Failed to invoke web service. Error returned from server: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel



To solve the problem:

1.) Add the root certificate of the web service. For more details look at:

http://connect.nintex.com/forums/thread/1433.aspx

2.) Run



foreach ($cert in (Get-ChildItem cert:\LocalMachine\Root)) { if (!$cert.HasPrivateKey) {New-SPTrustedRootAuthority -Name $cert.Thumbprint -Certificate $cert } }



For more details: http://connect.nintex.com/forums/post/19080.aspx