We have set up the new AX demo environment on our Hyper-V lab environment. Most of the features are running fine but there are some issues which we are trying to fix as they arise. Today my colleague was trying to edit a workflow and got an error. Turns out you need a specific application to edit the workflow and this app is downloaded and installed on the fly when you click the link. The problem here is that the SSL certificate in the AX environment is not trusted, this is not an issue when you use a normal browser since you can ignore the error, but it prohibits my computer from installing the application. Here is how you solve the error:
NOTE: THIS IS A TEMPORARY SOLUTION, IT IS IMPLEMENTED TO ACCESS A TRUSTED LAB ENVIRONMENT. YOU SHOULD NEVER EVER EVER DO THIS WITH A CERTIFICATE YOU COMPLETELY TRUST!!!!! IF YOU DO THIS WITH THE INCORRECT CERTIFICATE IT MEANS THAR BAD GUYS CAN SPY ON YOUR SECURE TRAFFIC!!!!!
- Browse to your AX site, click on the Certificate Error button and select View Certificates
- On the windows that appears click Install Certificate and select to install it into your Trusted Root Certificate
- Restart your browser and log back into your AX environment and verify that there no longer is a certificate warning
Now when you go to edit a Workflow you do not get an error 
You just login and the install will start automatically and you can edit the workflow.
NOTE AGAIN: THIS IS A TEMPORARY SOLUTION, IT IS IMPLEMENTED TO ACCESS A TRUSTED LAB ENVIRONMENT. YOU SHOULD NEVER EVER EVER DO THIS WITH A CERTIFICATE YOU COMPLETELY TRUST!!!!! IF YOU DO THIS WITH THE INCORRECT CERTIFICATE IT MEANS THAR BAD GUYS CAN SPY ON YOUR SECURE TRAFFIC!!!!!