I've imported all certificates and added them to sharepoint. Including the the cert that causes the error below.
When I run the following script to register my https workflow site to my https sharepoint farm :
Register-SPWorkflowService -SPSite "" -WorkflowHostUri ""
I get the following error:
Register-SPWorkflowService : The root of the certificate chain is not a
trusted root authority.
In my logs I see:
An operation failed because the following certificate has validation errors:
EventID: 8311