If after converting Produce to Windows Authentication you are prompted with a login dialog rather than the home page check the following:
A windows group has been added in Manage with the correct spelling and the External Group box has been checked.
The application pool identity in IIS has AD query permissions. Experiment by changing the application pool identity to a domain user with administrator privileges, as in the screen shot below.
Forms Authentication - Enabling AutoLogin capability for Design
Trouble logging in? Simply enter your email address OR username in order to reset your password.
For faster and more reliable delivery, add firstname.lastname@example.org to your trusted senders list in your email software.